{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99247","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.403Z","datePublished":"2026-11-03T11:18:26.163Z","dateUpdated":"2026-11-03T11:18:26.163Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-11-03T11:18:26.163Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace.c"],"versions":[{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"e8665e884e076d894f3eed8b9ea28e37a6448604","status":"affected","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"e8cfcd7e60eaa3b0dea4d71c64499604e7081736","status":"affected","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"afd38b10b1c6a5c5d6952b15b990596dab9684e6","status":"affected","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"813e18881c6472eb229a63180ff42c808e3e949b","status":"affected","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"7539c61f522ff693d9565a0411386c2236e776cd","status":"affected","versionType":"git"},{"version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","lessThan":"b3b974008388ab59e44d764ba7a63c988fec2524","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.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.191","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.161","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.115","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.59","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.13","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","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":"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"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e8665e884e076d894f3eed8b9ea28e37a6448604"},{"url":"https://git.kernel.org/stable/c/e8cfcd7e60eaa3b0dea4d71c64499604e7081736"},{"url":"https://git.kernel.org/stable/c/afd38b10b1c6a5c5d6952b15b990596dab9684e6"},{"url":"https://git.kernel.org/stable/c/813e18881c6472eb229a63180ff42c808e3e949b"},{"url":"https://git.kernel.org/stable/c/7539c61f522ff693d9565a0411386c2236e776cd"},{"url":"https://git.kernel.org/stable/c/b3b974008388ab59e44d764ba7a63c988fec2524"}],"title":"tracing: Do not initialize tracefs work if tracing is disabled","x_generator":{"engine":"bippy-1.2.0"}}}}