{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-26703", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.158Z", "datePublished": "2024-04-03T14:55:01.838Z", "dateUpdated": "2026-05-11T20:02:32.960Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:02:32.960Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/timerlat: Move hrtimer_init to timerlat_fd open()\n\nCurrently, the timerlat's hrtimer is initialized at the first read of\ntimerlat_fd, and destroyed at close(). It works, but it causes an error\nif the user program open() and close() the file without reading.\n\nHere's an example:\n\n # echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options\n # echo timerlat > /sys/kernel/debug/tracing/current_tracer\n\n # cat <<EOF > ./timerlat_load.py\n # !/usr/bin/env python3\n\n timerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r')\n timerlat_fd.close();\n EOF\n\n # ./taskset -c 0 ./timerlat_load.py\n<BOOM>\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:hrtimer_active+0xd/0x50\n Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\n RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\n RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\n RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\n R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\n FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n <TASK>\n ? __die+0x23/0x70\n ? page_fault_oops+0x171/0x4e0\n ? srso_alias_return_thunk+0x5/0x7f\n ? avc_has_extended_perms+0x237/0x520\n ? exc_page_fault+0x7f/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? hrtimer_active+0xd/0x50\n hrtimer_cancel+0x15/0x40\n timerlat_fd_release+0x48/0xe0\n __fput+0xf5/0x290\n __x64_sys_close+0x3d/0x80\n do_syscall_64+0x60/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? __x64_sys_ioctl+0x72/0xd0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? exit_to_user_mode_prepare+0x142/0x1f0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n RIP: 0033:0x7f2ffb321594\n Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\n RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\n RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\n R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\n R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\n </TASK>\n CR2: 0000000000000010\n ---[ end trace 0000000000000000 ]---\n\nMove hrtimer_init to timerlat_fd open() to avoid this problem."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_osnoise.c"], "versions": [{"version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "5f703935fdb559642d85b2088442ee55a557ae6d", "status": "affected", "versionType": "git"}, {"version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "2354d29986ebd138f89c2b73fecf8237e0a4ad6b", "status": "affected", "versionType": "git"}, {"version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "1389358bb008e7625942846e9f03554319b7fecc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_osnoise.c"], "versions": [{"version": "6.5", "status": "affected"}, {"version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.18", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.6", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8", "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": "6.5", "versionEndExcluding": "6.6.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.7.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d"}, {"url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b"}, {"url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc"}], "title": "tracing/timerlat: Move hrtimer_init to timerlat_fd open()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26703", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-05T18:03:40.350570Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:49:26.798Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.874Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.874Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26703", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-05T18:03:40.350570Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:01:22.299Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "tracing/timerlat: Move hrtimer_init to timerlat_fd open()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "5f703935fdb559642d85b2088442ee55a557ae6d", "versionType": "git"}, {"status": "affected", "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "2354d29986ebd138f89c2b73fecf8237e0a4ad6b", "versionType": "git"}, {"status": "affected", "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "lessThan": "1389358bb008e7625942846e9f03554319b7fecc", "versionType": "git"}], "programFiles": ["kernel/trace/trace_osnoise.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"status": "unaffected", "version": "0", "lessThan": "6.5", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.18", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.6", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/trace/trace_osnoise.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d"}, {"url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b"}, {"url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/timerlat: Move hrtimer_init to timerlat_fd open()\n\nCurrently, the timerlat's hrtimer is initialized at the first read of\ntimerlat_fd, and destroyed at close(). It works, but it causes an error\nif the user program open() and close() the file without reading.\n\nHere's an example:\n\n # echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options\n # echo timerlat > /sys/kernel/debug/tracing/current_tracer\n\n # cat <<EOF > ./timerlat_load.py\n # !/usr/bin/env python3\n\n timerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r')\n timerlat_fd.close();\n EOF\n\n # ./taskset -c 0 ./timerlat_load.py\n<BOOM>\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:hrtimer_active+0xd/0x50\n Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\n RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\n RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\n RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\n R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\n FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n <TASK>\n ? __die+0x23/0x70\n ? page_fault_oops+0x171/0x4e0\n ? srso_alias_return_thunk+0x5/0x7f\n ? avc_has_extended_perms+0x237/0x520\n ? exc_page_fault+0x7f/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? hrtimer_active+0xd/0x50\n hrtimer_cancel+0x15/0x40\n timerlat_fd_release+0x48/0xe0\n __fput+0xf5/0x290\n __x64_sys_close+0x3d/0x80\n do_syscall_64+0x60/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? __x64_sys_ioctl+0x72/0xd0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? exit_to_user_mode_prepare+0x142/0x1f0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n RIP: 0033:0x7f2ffb321594\n Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\n RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\n RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\n R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\n R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\n </TASK>\n CR2: 0000000000000010\n ---[ end trace 0000000000000000 ]---\n\nMove hrtimer_init to timerlat_fd open() to avoid this problem."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.18", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.6", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "6.5"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:02:32.960Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26703", "state": "PUBLISHED", "dateUpdated": "2026-05-11T20:02:32.960Z", "dateReserved": "2024-02-19T14:20:24.158Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-03T14:55:01.838Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "66A88832-B39F-48D0-BFA1-F660E52CE523", "versionEndExcluding": "6.6.18", "versionStartIncluding": "6.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C6D6A5C8-7308-42A9-8A72-ABF3DEA4BB82", "versionEndExcluding": "6.7.6", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*", "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*", "matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/timerlat: Move hrtimer_init to timerlat_fd open()\n\nCurrently, the timerlat's hrtimer is initialized at the first read of\ntimerlat_fd, and destroyed at close(). It works, but it causes an error\nif the user program open() and close() the file without reading.\n\nHere's an example:\n\n # echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options\n # echo timerlat > /sys/kernel/debug/tracing/current_tracer\n\n # cat <<EOF > ./timerlat_load.py\n # !/usr/bin/env python3\n\n timerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r')\n timerlat_fd.close();\n EOF\n\n # ./taskset -c 0 ./timerlat_load.py\n<BOOM>\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:hrtimer_active+0xd/0x50\n Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\n RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\n RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\n RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\n R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\n FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n <TASK>\n ? __die+0x23/0x70\n ? page_fault_oops+0x171/0x4e0\n ? srso_alias_return_thunk+0x5/0x7f\n ? avc_has_extended_perms+0x237/0x520\n ? exc_page_fault+0x7f/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? hrtimer_active+0xd/0x50\n hrtimer_cancel+0x15/0x40\n timerlat_fd_release+0x48/0xe0\n __fput+0xf5/0x290\n __x64_sys_close+0x3d/0x80\n do_syscall_64+0x60/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? __x64_sys_ioctl+0x72/0xd0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? exit_to_user_mode_prepare+0x142/0x1f0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n RIP: 0033:0x7f2ffb321594\n Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\n RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\n RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\n R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\n R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\n </TASK>\n CR2: 0000000000000010\n ---[ end trace 0000000000000000 ]---\n\nMove hrtimer_init to timerlat_fd open() to avoid this problem."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing/timerlat: mover hrtimer_init a timerlat_fd open() Actualmente, el hrtimer de timerlat se inicializa en la primera lectura de timerlat_fd y se destruye al cerrar(). Funciona, pero causa un error si el programa de usuario abre() y cierra() el archivo sin leerlo. Aqu\u00ed hay un ejemplo: # echo NO_OSNOISE_WORKLOAD &gt; /sys/kernel/debug/tracing/osnoise/options # echo timerlat &gt; /sys/kernel/debug/tracing/current_tracer # cat &lt; ./timerlat_load.py # !/usr/ bin/env python3 timerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r') timerlat_fd.close(); EOF # ./taskset -c 0 ./timerlat_load.py ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000010 #PF: acceso de lectura del supervisor en modo kernel #PF: c\u00f3digo_de error(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 2673 Comm: python3 No contaminado 6.6.13-200.fc39.x86_64 #1 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.16. 3-1.fc39 01/04/2014 RIP: 0010:hrtimer_active+0xd/0x50 C\u00f3digo: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 &lt;8b&gt; 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d RSP: 0018:ffffb031009b7e10 EF LAGS: 00010286 RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08 RBP: ffff9118f786db80 R08: ffff9117a0ddd42 0 R09: ffff9117804d4f70 R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08 R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 000 0000000000000 FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000( 0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000010 CR3: 00000001b402e000 CR4: 000000000075 0ee0 PKRU: 55555554 Seguimiento de llamadas: ? __morir+0x23/0x70 ? page_fault_oops+0x171/0x4e0? srso_alias_return_thunk+0x5/0x7f? avc_has_extended_perms+0x237/0x520? exc_page_fault+0x7f/0x180? asm_exc_page_fault+0x26/0x30? hrtimer_active+0xd/0x50 hrtimer_cancel+0x15/0x40 timerlat_fd_release+0x48/0xe0 __fput+0xf5/0x290 __x64_sys_close+0x3d/0x80 do_syscall_64+0x60/0x90 ? srso_alias_return_thunk+0x5/0x7f? __x64_sys_ioctl+0x72/0xd0? srso_alias_return_thunk+0x5/0x7f? syscall_exit_to_user_mode+0x2b/0x40? srso_alias_return_thunk+0x5/0x7f? do_syscall_64+0x6c/0x90? srso_alias_return_thunk+0x5/0x7f? exit_to_user_mode_prepare+0x142/0x1f0? srso_alias_return_thunk+0x5/0x7f? syscall_exit_to_user_mode+0x2b/0x40? srso_alias_return_thunk+0x5/0x7f? do_syscall_64+0x6c/0x90 Entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f2ffb321594 C\u00f3digo: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 0 0 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 &lt;48&gt; 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 O IG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0 000000000000000 R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003 R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 0000 7f2ffba4e668 CR2: 0000000000000010 ---[ end trace 0000000000000000 ]--- Mueva hrtimer_init a timerlat_fd open() para evitar este problema."}], "id": "CVE-2024-26703", "lastModified": "2025-02-27T21:59:09.400", "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": "2024-04-03T15:15:53.140", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1389358bb008e7625942846e9f03554319b7fecc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2354d29986ebd138f89c2b73fecf8237e0a4ad6b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f703935fdb559642d85b2088442ee55a557ae6d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: tracing/timerlat: Move hrtimer_init to timerlat_fd open()", "id": "2273176", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273176"}, "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:\ntracing/timerlat: Move hrtimer_init to timerlat_fd open()\nCurrently, the timerlat's hrtimer is initialized at the first read of\ntimerlat_fd, and destroyed at close(). It works, but it causes an error\nif the user program open() and close() the file without reading.\nHere's an example:\n# echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options\n# echo timerlat > /sys/kernel/debug/tracing/current_tracer\n# cat <<EOF > ./timerlat_load.py\n# !/usr/bin/env python3\ntimerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r')\ntimerlat_fd.close();\nEOF\n# ./taskset -c 0 ./timerlat_load.py\n<BOOM>\nBUG: kernel NULL pointer dereference, address: 0000000000000010\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\nRIP: 0010:hrtimer_active+0xd/0x50\nCode: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\nRSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\nRAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\nRBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\nR10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\nR13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\nFS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\nPKRU: 55555554\nCall Trace:\n<TASK>\n? __die+0x23/0x70\n? page_fault_oops+0x171/0x4e0\n? srso_alias_return_thunk+0x5/0x7f\n? avc_has_extended_perms+0x237/0x520\n? exc_page_fault+0x7f/0x180\n? asm_exc_page_fault+0x26/0x30\n? hrtimer_active+0xd/0x50\nhrtimer_cancel+0x15/0x40\ntimerlat_fd_release+0x48/0xe0\n__fput+0xf5/0x290\n__x64_sys_close+0x3d/0x80\ndo_syscall_64+0x60/0x90\n? srso_alias_return_thunk+0x5/0x7f\n? __x64_sys_ioctl+0x72/0xd0\n? srso_alias_return_thunk+0x5/0x7f\n? syscall_exit_to_user_mode+0x2b/0x40\n? srso_alias_return_thunk+0x5/0x7f\n? do_syscall_64+0x6c/0x90\n? srso_alias_return_thunk+0x5/0x7f\n? exit_to_user_mode_prepare+0x142/0x1f0\n? srso_alias_return_thunk+0x5/0x7f\n? syscall_exit_to_user_mode+0x2b/0x40\n? srso_alias_return_thunk+0x5/0x7f\n? do_syscall_64+0x6c/0x90\nentry_SYSCALL_64_after_hwframe+0x6e/0xd8\nRIP: 0033:0x7f2ffb321594\nCode: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\nRSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\nRAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\nRBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\nR10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\nR13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\n</TASK>\nCR2: 0000000000000010\n---[ end trace 0000000000000000 ]---\nMove hrtimer_init to timerlat_fd open() to avoid this problem.", "A NULL pointer dereference flaw was found in the Linux kernel\u2019s trace functionality. This flaw allows a local privileged user to crash the system."], "name": "CVE-2024-26703", "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: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": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26703\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26703\nhttps://lore.kernel.org/linux-cve-announce/2024040340-CVE-2024-26703-d60d@gregkh/T"], "statement": "This issue is fixed in Red Hat Enterprise Linux 9.", "threat_severity": "Low"}

{}