{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47346", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47346", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-21T14:35:52.284Z", "updatedAt": "2026-08-05T08:47:21.617Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()", "summary": "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 ==================================================================", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "04bd77ef4f4d9fc6102023b85f4590fc2130aac5" }, { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "ef0a06acc6b16388640ad367eedfa2a17f1945db" }, { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "35c1c4bd2d59ad734129d4e232af9d1098023918" }, { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "733d4d95c0101d5f277b8e4910411d016e49a9dc" }, { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "0115687be7b13993066aef602253a53d55f5b11f" }, { "version": "0c3fc4d5fa26092853278145aca9b21fa52a3e93", "status": "affected", "versionType": "git", "lessThan": "5fae8a946ac2df879caf3f79a193d4766d00239b" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.14" }, { "version": "4.19.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.133", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.51", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.12.18", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.12.*" }, { "version": "5.13.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.13.*" }, { "version": "5.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }