{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"e8665e884e076d894f3eed8b9ea28e37a6448604","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"},{"lessThan":"e8cfcd7e60eaa3b0dea4d71c64499604e7081736","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"},{"lessThan":"afd38b10b1c6a5c5d6952b15b990596dab9684e6","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"},{"lessThan":"813e18881c6472eb229a63180ff42c808e3e949b","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"},{"lessThan":"7539c61f522ff693d9565a0411386c2236e776cd","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"},{"lessThan":"b3b974008388ab59e44d764ba7a63c988fec2524","status":"affected","version":"6621a7004684bfcff5af4c8e4d37989941f42a6b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.191","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.161","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.115","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.59","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-99247","cwes":[],"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.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793704706163,"publishedAt":1793704706163,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/e8665e884e076d894f3eed8b9ea28e37a6448604"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/e8cfcd7e60eaa3b0dea4d71c64499604e7081736"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/afd38b10b1c6a5c5d6952b15b990596dab9684e6"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/813e18881c6472eb229a63180ff42c808e3e949b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/7539c61f522ff693d9565a0411386c2236e776cd"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/b3b974008388ab59e44d764ba7a63c988fec2524"}],"remediation":[],"revision":"d9e55df3b0356d541b907ee2abbfd1ed59bc15a4a5d341a9f7fab7c0ac656343","sources":[{"modifiedAt":1793704706163,"name":"CNA: Linux","retrievedAt":1793707723904,"url":"https://www.cve.org/CVERecord?id=CVE-2026-99247"}],"ssvc":null,"status":"published","title":"tracing: Do not initialize tracefs work if tracing is disabled","updatedAt":1793707723904}