{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-26657", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.145Z", "datePublished": "2024-04-02T06:08:44.329Z", "dateUpdated": "2026-05-11T20:01:38.762Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:01:38.762Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: fix null-ptr-deref in init entity\n\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>.\nFor example the following code:\n\n static void Syzkaller2(int fd)\n {\n\tunion drm_amdgpu_ctx arg1;\n\tunion drm_amdgpu_wait_cs arg2;\n\n\targ1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\n\tret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);\n\n\targ2.in.handle = 0x0;\n\targ2.in.timeout = 0x2000000000000;\n\targ2.in.ip_type = AMD_IP_VPE /* 0x9 */;\n\targ2->in.ip_instance = 0x0;\n\targ2.in.ring = 0x0;\n\targ2.in.ctx_id = arg1.out.alloc.ctx_id;\n\n\tdrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);\n }\n\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\n\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n\n[ +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[ +0.007086] #PF: supervisor read access in kernel mode\n[ +0.005234] #PF: error_code(0x0000) - not-present page\n[ +0.005232] PGD 0 P4D 0\n[ +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G B W L 6.7.0+ #4\n[ +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[ +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[ +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[ +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[ +0.008236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[ +0.007175] Call Trace:\n[ +0.002561] <TASK>\n[ +0.002141] ? show_regs+0x6a/0x80\n[ +0.003473] ? __die+0x25/0x70\n[ +0.003124] ? page_fault_oops+0x214/0x720\n[ +0.004179] ? preempt_count_sub+0x18/0xc0\n[ +0.004093] ? __pfx_page_fault_oops+0x10/0x10\n[ +0.004590] ? srso_return_thunk+0x5/0x5f\n[ +0.004000] ? vprintk_default+0x1d/0x30\n[ +0.004063] ? srso_return_thunk+0x5/0x5f\n[ +0.004087] ? vprintk+0x5c/0x90\n[ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005807] ? srso_return_thunk+0x5/0x5f\n[ +0.004090] ? _printk+0xb3/0xe0\n[ +0.003293] ? __pfx__printk+0x10/0x10\n[ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[ +0.005482] ? do_user_addr_fault+0x345/0x770\n[ +0.004361] ? exc_page_fault+0x64/0xf0\n[ +0.003972] ? asm_exc_page_fault+0x27/0x30\n[ +0.004271] ? add_taint+0x2a/0xa0\n[ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[ +0.009530] ? finish_task_switch.isra.0+0x129/0x470\n[ +0.005068] ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[ +0.010063] ? __kasan_check_write+0x14/0x20\n[ +0.004356] ? srso_return_thunk+0x5/0x5f\n[ +0.004001] ? mutex_unlock+0x81/0xd0\n[ +0.003802] ? srso_return_thunk+0x5/0x5f\n[ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[ +0.009355] ? __pfx_\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/scheduler/sched_entity.c"], "versions": [{"version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "74cd204c7afe498aa9dcc3ebf0ecac53d477a429", "status": "affected", "versionType": "git"}, {"version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "54b5b7275dfdec35812ccce70930cd7c4ee612b2", "status": "affected", "versionType": "git"}, {"version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "f34e8bb7d6c6626933fe993e03ed59ae85e16abb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/scheduler/sched_entity.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.7.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.8.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429"}, {"url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2"}, {"url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb"}], "title": "drm/sched: fix null-ptr-deref in init entity", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.434Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26657", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:53:53.048412Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:40.914Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.434Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26657", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:53:53.048412Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:18.093Z"}}], "cna": {"title": "drm/sched: fix null-ptr-deref in init entity", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "74cd204c7afe498aa9dcc3ebf0ecac53d477a429", "versionType": "git"}, {"status": "affected", "version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "54b5b7275dfdec35812ccce70930cd7c4ee612b2", "versionType": "git"}, {"status": "affected", "version": "56e449603f0ac580700621a356d35d5716a62ce5", "lessThan": "f34e8bb7d6c6626933fe993e03ed59ae85e16abb", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/scheduler/sched_entity.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"status": "unaffected", "version": "0", "lessThan": "6.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.7.12", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8.3", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/scheduler/sched_entity.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429"}, {"url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2"}, {"url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: fix null-ptr-deref in init entity\n\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>.\nFor example the following code:\n\n static void Syzkaller2(int fd)\n {\n\tunion drm_amdgpu_ctx arg1;\n\tunion drm_amdgpu_wait_cs arg2;\n\n\targ1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\n\tret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);\n\n\targ2.in.handle = 0x0;\n\targ2.in.timeout = 0x2000000000000;\n\targ2.in.ip_type = AMD_IP_VPE /* 0x9 */;\n\targ2->in.ip_instance = 0x0;\n\targ2.in.ring = 0x0;\n\targ2.in.ctx_id = arg1.out.alloc.ctx_id;\n\n\tdrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);\n }\n\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\n\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n\n[ +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[ +0.007086] #PF: supervisor read access in kernel mode\n[ +0.005234] #PF: error_code(0x0000) - not-present page\n[ +0.005232] PGD 0 P4D 0\n[ +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G B W L 6.7.0+ #4\n[ +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[ +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[ +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[ +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[ +0.008236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[ +0.007175] Call Trace:\n[ +0.002561] <TASK>\n[ +0.002141] ? show_regs+0x6a/0x80\n[ +0.003473] ? __die+0x25/0x70\n[ +0.003124] ? page_fault_oops+0x214/0x720\n[ +0.004179] ? preempt_count_sub+0x18/0xc0\n[ +0.004093] ? __pfx_page_fault_oops+0x10/0x10\n[ +0.004590] ? srso_return_thunk+0x5/0x5f\n[ +0.004000] ? vprintk_default+0x1d/0x30\n[ +0.004063] ? srso_return_thunk+0x5/0x5f\n[ +0.004087] ? vprintk+0x5c/0x90\n[ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005807] ? srso_return_thunk+0x5/0x5f\n[ +0.004090] ? _printk+0xb3/0xe0\n[ +0.003293] ? __pfx__printk+0x10/0x10\n[ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[ +0.005482] ? do_user_addr_fault+0x345/0x770\n[ +0.004361] ? exc_page_fault+0x64/0xf0\n[ +0.003972] ? asm_exc_page_fault+0x27/0x30\n[ +0.004271] ? add_taint+0x2a/0xa0\n[ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[ +0.009530] ? finish_task_switch.isra.0+0x129/0x470\n[ +0.005068] ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[ +0.010063] ? __kasan_check_write+0x14/0x20\n[ +0.004356] ? srso_return_thunk+0x5/0x5f\n[ +0.004001] ? mutex_unlock+0x81/0xd0\n[ +0.003802] ? srso_return_thunk+0x5/0x5f\n[ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[ +0.009355] ? __pfx_\n---truncated---"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.12", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8.3", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:01:38.762Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26657", "state": "PUBLISHED", "dateUpdated": "2026-05-11T20:01:38.762Z", "dateReserved": "2024-02-19T14:20:24.145Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-02T06:08:44.329Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6BE9771A-BAFD-4624-95F9-58D536540C53", "versionEndExcluding": "6.7.12", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4C59BBC3-6495-4A77-9C82-55EC7CDF5E02", "versionEndExcluding": "6.8.3", "versionStartIncluding": "6.8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: fix null-ptr-deref in init entity\n\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>.\nFor example the following code:\n\n static void Syzkaller2(int fd)\n {\n\tunion drm_amdgpu_ctx arg1;\n\tunion drm_amdgpu_wait_cs arg2;\n\n\targ1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\n\tret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);\n\n\targ2.in.handle = 0x0;\n\targ2.in.timeout = 0x2000000000000;\n\targ2.in.ip_type = AMD_IP_VPE /* 0x9 */;\n\targ2->in.ip_instance = 0x0;\n\targ2.in.ring = 0x0;\n\targ2.in.ctx_id = arg1.out.alloc.ctx_id;\n\n\tdrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);\n }\n\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\n\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n\n[ +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[ +0.007086] #PF: supervisor read access in kernel mode\n[ +0.005234] #PF: error_code(0x0000) - not-present page\n[ +0.005232] PGD 0 P4D 0\n[ +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G B W L 6.7.0+ #4\n[ +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[ +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[ +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[ +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[ +0.008236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[ +0.007175] Call Trace:\n[ +0.002561] <TASK>\n[ +0.002141] ? show_regs+0x6a/0x80\n[ +0.003473] ? __die+0x25/0x70\n[ +0.003124] ? page_fault_oops+0x214/0x720\n[ +0.004179] ? preempt_count_sub+0x18/0xc0\n[ +0.004093] ? __pfx_page_fault_oops+0x10/0x10\n[ +0.004590] ? srso_return_thunk+0x5/0x5f\n[ +0.004000] ? vprintk_default+0x1d/0x30\n[ +0.004063] ? srso_return_thunk+0x5/0x5f\n[ +0.004087] ? vprintk+0x5c/0x90\n[ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005807] ? srso_return_thunk+0x5/0x5f\n[ +0.004090] ? _printk+0xb3/0xe0\n[ +0.003293] ? __pfx__printk+0x10/0x10\n[ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[ +0.005482] ? do_user_addr_fault+0x345/0x770\n[ +0.004361] ? exc_page_fault+0x64/0xf0\n[ +0.003972] ? asm_exc_page_fault+0x27/0x30\n[ +0.004271] ? add_taint+0x2a/0xa0\n[ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[ +0.009530] ? finish_task_switch.isra.0+0x129/0x470\n[ +0.005068] ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[ +0.010063] ? __kasan_check_write+0x14/0x20\n[ +0.004356] ? srso_return_thunk+0x5/0x5f\n[ +0.004001] ? mutex_unlock+0x81/0xd0\n[ +0.003802] ? srso_return_thunk+0x5/0x5f\n[ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[ +0.009355] ? __pfx_\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/sched: corrige null-ptr-deref en la entidad init. El error se puede activar enviando un amdgpu_cs_wait_ioctl al controlador DRM AMDGPU en cualquier ASIC con contexto v\u00e1lido. El error fue reportado por Joonkyo Jung . Por ejemplo, el siguiente c\u00f3digo: static void Syzkaller2(int fd) { union drm_amdgpu_ctx arg1; uni\u00f3n drm_amdgpu_wait_cs arg2; arg1.in.op = AMDGPU_CTX_OP_ALLOC_CTX; ret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &amp;arg1); arg2.in.handle = 0x0; arg2.in.timeout = 0x2000000000000; arg2.in.ip_type = AMD_IP_VPE /* 0x9 */; arg2-&gt;in.ip_instance = 0x0; arg2.in.ring = 0x0; arg2.in.ctx_id = arg1.out.alloc.ctx_id; drmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &amp;arg2); } Se podr\u00eda suponer que el ioctl AMDGPU_WAIT_CS sin trabajo enviado previamente debe devolver el error, pero la siguiente confirmaci\u00f3n 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa modific\u00f3 la l\u00f3gica y permiti\u00f3 que sched_rq fuera igual a NULL. Como resultado, cuando no hay trabajo, ioctl AMDGPU_WAIT_CS devuelve \u00e9xito. El cambio corrige null-ptr-deref en la entidad init y la siguiente pila demuestra la condici\u00f3n de error: [+0.000007] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000028 [+0.007086] #PF: acceso de lectura del supervisor en modo kernel [+0.005234 ] #PF: error_code(0x0000) - p\u00e1gina no presente [ +0.005232] PGD 0 P4D 0 [ +0.002501] Ups: 0000 [#1] PREEMPT SMP KASAN NOPTI [ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted : GBWL 6.7.0+ #4 [ +0.007797] Nombre del hardware: Nombre del producto del sistema ASUS/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 03/12/2020 [ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3 /0x420 [gpu_sched] [ +0.006426] C\u00f3digo: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8 d 7b 28 e8 3d 80 82 e0 &lt;48&gt; 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c [ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282 [ +0. 005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX : ffffffff8113f3fa [ +0.007326] RDX: ffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0 [ +0.007264] RBP: ffffc90014c1fa80 R08: 00000000000000 01 R09: ffffbfff0a7889c [ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010 [ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000 [ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000 [ +0.00823 6] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4 : 0000000000350ef0 [ +0.007175] Seguimiento de llamadas: [ +0.002561] [ +0.002141] ? show_regs+0x6a/0x80 [+0.003473]? __die+0x25/0x70 [ +0.003124] ? page_fault_oops+0x214/0x720 [+0.004179]? preempt_count_sub+0x18/0xc0 [+0.004093]? __pfx_page_fault_oops+0x10/0x10 [ +0.004590] ? srso_return_thunk+0x5/0x5f [+0.004000]? vprintk_default+0x1d/0x30 [+0.004063]? srso_return_thunk+0x5/0x5f [+0.004087]? vprintk+0x5c/0x90 [ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched] [+0.005807]? srso_return_thunk+0x5/0x5f [+0.004090]? _printk+0xb3/0xe0 [ +0.003293] ? __pfx__printk+0x10/0x10 [ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [+0.005482]? do_user_addr_fault+0x345/0x770 [ +0.004361] ? exc_page_fault+0x64/0xf0 [+0.003972]? asm_exc_page_fault+0x27/0x30 [+0.004271]? add_taint+0x2a/0xa0 [ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched] [ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu] [ +0.009530] ? terminar_task_switch.isra.0+0x129/0x470 [+0.005068]? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu] [ +0.010063] ? __kasan_check_write+0x14/0x20 [ +0.004356] ? srso_return_thunk+0x5/0x5f [+0.004001]? mutex_unlock+0x81/0xd0 [+0.003802]? srso_return_thunk+0x5/0x5f [ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu] [ +0.009355] ? __pfx_ ---truncado---"}], "id": "CVE-2024-26657", "lastModified": "2025-01-07T17:20:00.840", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-04-02T07:15:42.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/sched: fix null-ptr-deref in init entity", "id": "2272687", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272687"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/sched: fix null-ptr-deref in init entity\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>.\nFor example the following code:\nstatic void Syzkaller2(int fd)\n{\nunion drm_amdgpu_ctx arg1;\nunion drm_amdgpu_wait_cs arg2;\narg1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\nret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);\narg2.in.handle = 0x0;\narg2.in.timeout = 0x2000000000000;\narg2.in.ip_type = AMD_IP_VPE /* 0x9 */;\narg2->in.ip_instance = 0x0;\narg2.in.ring = 0x0;\narg2.in.ctx_id = arg1.out.alloc.ctx_id;\ndrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);\n}\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n[ +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[ +0.007086] #PF: supervisor read access in kernel mode\n[ +0.005234] #PF: error_code(0x0000) - not-present page\n[ +0.005232] PGD 0 P4D 0\n[ +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G B W L 6.7.0+ #4\n[ +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[ +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[ +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[ +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[ +0.008236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[ +0.007175] Call Trace:\n[ +0.002561] <TASK>\n[ +0.002141] ? show_regs+0x6a/0x80\n[ +0.003473] ? __die+0x25/0x70\n[ +0.003124] ? page_fault_oops+0x214/0x720\n[ +0.004179] ? preempt_count_sub+0x18/0xc0\n[ +0.004093] ? __pfx_page_fault_oops+0x10/0x10\n[ +0.004590] ? srso_return_thunk+0x5/0x5f\n[ +0.004000] ? vprintk_default+0x1d/0x30\n[ +0.004063] ? srso_return_thunk+0x5/0x5f\n[ +0.004087] ? vprintk+0x5c/0x90\n[ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005807] ? srso_return_thunk+0x5/0x5f\n[ +0.004090] ? _printk+0xb3/0xe0\n[ +0.003293] ? __pfx__printk+0x10/0x10\n[ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[ +0.005482] ? do_user_addr_fault+0x345/0x770\n[ +0.004361] ? exc_page_fault+0x64/0xf0\n[ +0.003972] ? asm_exc_page_fault+0x27/0x30\n[ +0.004271] ? add_taint+0x2a/0xa0\n[ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[ +0.009530] ? finish_task_switch.isra.0+0x129/0x470\n[ +0.005068] ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[ +0.010063] ? __kasan_check_write+0x14/0x20\n[ +0.004356] ? srso_return_thunk+0x5/0x5f\n[ +0.004001] ? mutex_unlock+0x81/0xd0\n[ +0.003802] ? srso_return_thunk+0x5/0x5f\n[ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[ +0.009355] ? __pfx_\n---truncated---"], "name": "CVE-2024-26657", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26657\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26657"], "threat_severity": "Low"}

{}