{"id":"CVE-2026-99247","aliases":[],"cve":{"records":[{"id":"CVE-2026-99247","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.403Z","published":"2026-11-03T11:18:26.163Z","modified":"2026-11-03T11:18:26.163Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-03T11:18:26.163Z"}],"references":[{"url":"https://git.kernel.org/stable/c/e8665e884e076d894f3eed8b9ea28e37a6448604","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/e8cfcd7e60eaa3b0dea4d71c64499604e7081736","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/afd38b10b1c6a5c5d6952b15b990596dab9684e6","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/813e18881c6472eb229a63180ff42c808e3e949b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/7539c61f522ff693d9565a0411386c2236e776cd","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/b3b974008388ab59e44d764ba7a63c988fec2524","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"tracing: Do not initialize tracefs work if tracing is disabled","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Do not initialize tracefs work if tracing is disabled\n\nIf trace buffer allocation fails during early boot (e.g.  in\nearly_trace_init() -> allocate_trace_buffers()), tracing_disabled is\nleft set to 1 and the global trace array events list remains\nuninitialized.\n\nLater during boot, tracer_init_tracefs() (invoked via fs_initcall)\nqueues tracerfs_init_work asynchronously without checking if tracing was\ndisabled.  When tracer_init_tracefs_work_func() runs, it calls\nevent_trace_init() and init_tracer_tracefs(&global_trace, NULL)\nunconditionally.  This leads to __find_event_file() dereferencing an\nuninitialized tr->events list, causing an early boot NULL pointer\ndereference Oops:\n\n  BUG: Kernel NULL pointer dereference on read at 0x00000010\n  Faulting instruction address: 0xc000000000485be0\n  Oops: Kernel access of bad area, sig: 7 [#1]\n  ...\n  NIP [c000000000485be0] __find_event_file+0x70/0x3c0\n  LR  [c000000000448874] init_tracer_tracefs+0x274/0xc80\n  Call Trace:\n   init_tracer_tracefs+0x274/0xc80\n   tracer_init_tracefs_work_func+0x50/0x320\n   process_one_work+0x1e8/0x5c0\n   worker_thread+0x1dc/0x3d0\n   kthread+0x194/0x1b0\n   start_kernel_thread+0x14/0x18\n\nCheck tracing_disabled at the beginning of tracer_init_tracefs_work_func()\nand return immediately if tracing is disabled or failed to initialize,\npreventing the crash.","score":null,"severity":"unknown","published":"2026-11-03T11:18:26.163Z","modified":"2026-11-03T11:18:26.163Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"e8665e884e076d894f3eed8b9ea28e37a6448604","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"e8cfcd7e60eaa3b0dea4d71c64499604e7081736","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"afd38b10b1c6a5c5d6952b15b990596dab9684e6","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"813e18881c6472eb229a63180ff42c808e3e949b","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"7539c61f522ff693d9565a0411386c2236e776cd","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","status":"affected","lessThan":"b3b974008388ab59e44d764ba7a63c988fec2524","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99247"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99247"}],"remediation":[],"references":["https://git.kernel.org/stable/c/e8665e884e076d894f3eed8b9ea28e37a6448604","https://git.kernel.org/stable/c/e8cfcd7e60eaa3b0dea4d71c64499604e7081736","https://git.kernel.org/stable/c/afd38b10b1c6a5c5d6952b15b990596dab9684e6","https://git.kernel.org/stable/c/813e18881c6472eb229a63180ff42c808e3e949b","https://git.kernel.org/stable/c/7539c61f522ff693d9565a0411386c2236e776cd","https://git.kernel.org/stable/c/b3b974008388ab59e44d764ba7a63c988fec2524"],"sources":[{"name":"CVE","id":"CVE-2026-99247","modified":"2026-11-03T11:18:26.163Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99247"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-03T11:20:49.834Z","kev":{"status":"not-listed","checkedAt":"2026-11-06T21:20:33.816Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-03T11:30:33.244Z","attemptedAt":"2026-11-03T11:30:33.244Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-03T11:30:34.283Z","attemptedAt":"2026-11-03T11:30:34.283Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-03T11:30:33.244Z","attemptedAt":"2026-11-03T11:30:33.244Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-03T11:30:33.244Z","attemptedAt":"2026-11-03T11:30:33.244Z"}],"evidence":[],"aiSummary":{"text":"The Linux kernel has a vulnerability where tracing is not properly initialized if tracing is disabled, leading to a NULL pointer dereference. This affects versions prior to 6.1.191, 6.6.161, 6.12.115, 6.18.59, and 7.2.13. The vulnerability causes a kernel crash.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-03T12:21:16.233Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-99247"}]}}