{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47346", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.980Z", "datePublished": "2024-05-21T14:35:52.284Z", "dateUpdated": "2026-05-11T13:52:54.433Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:52:54.433Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\n\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing '\\0' from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n dump_backtrace+0x0/0x27c\n show_stack+0x20/0x2c\n dump_stack+0x11c/0x188\n print_address_description+0x3c/0x4a4\n __kasan_report+0x140/0x164\n kasan_report+0x10/0x18\n __asan_report_load4_noabort+0x1c/0x24\n tmc_update_etf_buffer+0x4b8/0x698\n etm_event_stop+0x248/0x2d8\n etm_event_del+0x20/0x2c\n event_sched_out+0x214/0x6f0\n group_sched_out+0xd0/0x270\n ctx_sched_out+0x2ec/0x518\n __perf_event_task_sched_out+0x4fc/0xe6c\n __schedule+0x1094/0x16a0\n preempt_schedule_irq+0x88/0x170\n arm64_preempt_schedule_irq+0xf0/0x18c\n el1_irq+0xe8/0x180\n perf_event_exec+0x4d8/0x56c\n setup_new_exec+0x204/0x400\n load_elf_binary+0x72c/0x18c0\n search_binary_handler+0x13c/0x420\n load_script+0x500/0x6c4\n search_binary_handler+0x13c/0x420\n 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Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n dump_backtrace+0x0/0x27c\n show_stack+0x20/0x2c\n dump_stack+0x11c/0x188\n print_address_description+0x3c/0x4a4\n __kasan_report+0x140/0x164\n kasan_report+0x10/0x18\n __asan_report_load4_noabort+0x1c/0x24\n tmc_update_etf_buffer+0x4b8/0x698\n etm_event_stop+0x248/0x2d8\n etm_event_del+0x20/0x2c\n event_sched_out+0x214/0x6f0\n group_sched_out+0xd0/0x270\n ctx_sched_out+0x2ec/0x518\n __perf_event_task_sched_out+0x4fc/0xe6c\n __schedule+0x1094/0x16a0\n preempt_schedule_irq+0x88/0x170\n arm64_preempt_schedule_irq+0xf0/0x18c\n el1_irq+0xe8/0x180\n perf_event_exec+0x4d8/0x56c\n setup_new_exec+0x204/0x400\n load_elf_binary+0x72c/0x18c0\n search_binary_handler+0x13c/0x420\n load_script+0x500/0x6c4\n search_binary_handler+0x13c/0x420\n exec_binprm+0x118/0x654\n __do_execve_file+0x77c/0xba4\n __arm64_compat_sys_execve+0x98/0xac\n el0_svc_common+0x1f8/0x5e0\n el0_svc_compat_handler+0x84/0xb0\n el0_svc_compat+0x10/0x50\n\n The buggy address belongs to the variable:\n barrier_pkt+0x10/0x40\n\n Memory state around the buggy address:\n ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\n ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n ^\n ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\n ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n =================================================================="}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:04:08.722Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47346", "state": "PUBLISHED", "dateUpdated": "2024-11-04T12:04:08.722Z", "dateReserved": "2024-05-21T14:28:16.980Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:35:52.284Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FF4CC424-32DE-434F-BAFA-9BC2F78E35C1", "versionEndExcluding": "4.19.198", "versionStartIncluding": "4.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "65A8F1FF-5639-455A-8BF4-9FF529240505", "versionEndExcluding": "5.4.133", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "93289127-DFB3-4515-89DD-50521FF8B7FF", "versionEndExcluding": "5.10.51", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "79D13C82-E06F-4A70-A3D1-C09494FBC94D", "versionEndExcluding": "5.12.18", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "853187F6-707A-487B-95C0-621B5211B43C", "versionEndExcluding": "5.13.3", "versionStartIncluding": "5.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\n\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing '\\0' from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n dump_backtrace+0x0/0x27c\n show_stack+0x20/0x2c\n dump_stack+0x11c/0x188\n print_address_description+0x3c/0x4a4\n __kasan_report+0x140/0x164\n kasan_report+0x10/0x18\n __asan_report_load4_noabort+0x1c/0x24\n tmc_update_etf_buffer+0x4b8/0x698\n etm_event_stop+0x248/0x2d8\n etm_event_del+0x20/0x2c\n event_sched_out+0x214/0x6f0\n group_sched_out+0xd0/0x270\n ctx_sched_out+0x2ec/0x518\n __perf_event_task_sched_out+0x4fc/0xe6c\n __schedule+0x1094/0x16a0\n preempt_schedule_irq+0x88/0x170\n arm64_preempt_schedule_irq+0xf0/0x18c\n el1_irq+0xe8/0x180\n perf_event_exec+0x4d8/0x56c\n setup_new_exec+0x204/0x400\n load_elf_binary+0x72c/0x18c0\n search_binary_handler+0x13c/0x420\n load_script+0x500/0x6c4\n search_binary_handler+0x13c/0x420\n exec_binprm+0x118/0x654\n __do_execve_file+0x77c/0xba4\n __arm64_compat_sys_execve+0x98/0xac\n el0_svc_common+0x1f8/0x5e0\n el0_svc_compat_handler+0x84/0xb0\n el0_svc_compat+0x10/0x50\n\n The buggy address belongs to the variable:\n barrier_pkt+0x10/0x40\n\n Memory state around the buggy address:\n ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\n ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n ^\n ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\n ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n =================================================================="}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: coresight: tmc-etf: Correcci\u00f3n global fuera de los l\u00edmites en tmc_update_etf_buffer() confirmaci\u00f3n 6f755e85c332 (\"coresight: Agregar ayuda para insertar paquetes de sincronizaci\u00f3n\") eliminado el final '\\0' desde la matriz barrier_pkt y actualic\u00e9 los sitios de llamadas como etb_update_buffer() para realizar comprobaciones adecuadas del tama\u00f1o de la barrera_pkt antes de leer, pero no se actualiz\u00f3 tmc_update_etf_buffer(), que todav\u00eda lee barrier_pkt m\u00e1s all\u00e1 del tama\u00f1o de la matriz, lo que genera un error de KASAN fuera de los l\u00edmites. Solucione este problema agregando una verificaci\u00f3n del tama\u00f1o de barrier_pkt antes de acceder, como se hace en etb_update_buffer(). bug: KASAN: global fuera de los l\u00edmites en tmc_update_etf_buffer+0x4b8/0x698 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffffffd05b7d1030 por tarea perf/2629 Rastreo de llamadas: dump_backtrace+0x0/0x27c show_stack+0x20/0x2c dump_stack+0x11c/0x188 descripci\u00f3n+0x3c /0x4a4 __kasan_report+0x140/0x164 kasan_report+0x10/0x18 __asan_report_load4_noabort+0x1c/0x24 tmc_update_etf_buffer+0x4b8/0x698 etm_event_stop+0x248/0x2d8 etm_event_del+0x20/0x2c event_sched_out+0x214/0x6f0 group_sched_out+0xd0/0x270 ctx_sched_out+0x2ec/0x518 __perf_event_task_sched_out+0x4fc /0xe6c __schedule+0x1094/0x16a0 preempt_schedule_irq+0x88/0x170 arm64_preempt_schedule_irq+0xf0/0x18c el1_irq+0xe8/0x180 perf_event_exec+0x4d8/0x56c setup_new_exec+0x204/0x4 00 load_elf_binary+0x72c/0x18c0 search_binary_handler+0x13c/0x420 load_script+0x500/0x6c4 search_binary_handler+0x13c /0x420 exec_binprm+0x118/0x654 __do_execve_file+0x77c/0xba4 __arm64_compat_sys_execve+0x98/0xac el0_svc_common+0x1f8/0x5e0 el0_svc_compat_handler+0x84/0xb0 x10/0x50 La direcci\u00f3n del buggy pertenece a la variable: barrier_pkt+0x10/0x40 Estado de la memoria alrededor del buggy direcci\u00f3n: ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffd05b7d1000: 0 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03 ^ ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ====== ==================================================== =========="}], "id": "CVE-2021-47346", "lastModified": "2025-03-06T12:53:53.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-21T15:15:21.217", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()", "id": "2282408", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282408"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing '\\0' from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\nBUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\nRead of size 4 at addr ffffffd05b7d1030 by task perf/2629\nCall trace:\ndump_backtrace+0x0/0x27c\nshow_stack+0x20/0x2c\ndump_stack+0x11c/0x188\nprint_address_description+0x3c/0x4a4\n__kasan_report+0x140/0x164\nkasan_report+0x10/0x18\n__asan_report_load4_noabort+0x1c/0x24\ntmc_update_etf_buffer+0x4b8/0x698\netm_event_stop+0x248/0x2d8\netm_event_del+0x20/0x2c\nevent_sched_out+0x214/0x6f0\ngroup_sched_out+0xd0/0x270\nctx_sched_out+0x2ec/0x518\n__perf_event_task_sched_out+0x4fc/0xe6c\n__schedule+0x1094/0x16a0\npreempt_schedule_irq+0x88/0x170\narm64_preempt_schedule_irq+0xf0/0x18c\nel1_irq+0xe8/0x180\nperf_event_exec+0x4d8/0x56c\nsetup_new_exec+0x204/0x400\nload_elf_binary+0x72c/0x18c0\nsearch_binary_handler+0x13c/0x420\nload_script+0x500/0x6c4\nsearch_binary_handler+0x13c/0x420\nexec_binprm+0x118/0x654\n__do_execve_file+0x77c/0xba4\n__arm64_compat_sys_execve+0x98/0xac\nel0_svc_common+0x1f8/0x5e0\nel0_svc_compat_handler+0x84/0xb0\nel0_svc_compat+0x10/0x50\nThe buggy address belongs to the variable:\nbarrier_pkt+0x10/0x40\nMemory state around the buggy address:\nffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\nffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n^\nffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\nffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n=================================================================="], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47346", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47346\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47346\nhttps://lore.kernel.org/linux-cve-announce/2024052139-CVE-2021-47346-dcfa@gregkh/T"], "statement": "This vulnerability is rated as moderate in severity. It can lead to system crashes or memory corruption but does not directly compromise data security or unauthorized access.", "threat_severity": "Moderate"}

{}