{"id":"CVE-2026-89749","state":"PUBLISHED","title":"tracing: Fix crash passing ERR_PTR to kthread_stop()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix crash passing ERR_PTR to kthread_stop()\n\nevent_test_stuff() calls kthread_run() and unconditionally passes the\nreturned task_struct pointer to kthread_stop(). kthread_run() returns an\nerror pointer such as ERR_PTR(-ENOMEM) when kthread creation fails, for\nexample under memory pressure during the boot-time event self-test.\nkthread_stop() then dereferences the invalid pointer, crashing the kernel.\n\nCheck the result of kthread_run() before passing it to kthread_stop(). Use\nWARN_ON() so that a failure to create the self-test thread does not go\nunnoticed, matching the ring-buffer self-test fix in commit\n91542863abad (\"ring-buffer: Fix crash passing ERR_PTR to kthread_stop()\").","publishedAt":"2026-09-11T19:46:53.822Z","updatedAt":"2026-10-19T08:52:03.128Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"c1a4fb7aa290f158d50654d640292e49d9055fd1","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"42ccb215ef0a552acbbd32f81009bfe4b278ba77","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"98d06fb9865a490e12ebe32d65b9ffac6108614d","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"ceb1707aef5824cf024eb82d10787b7621e2ff35","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"12a499f741fc5be3731c8b0a0d909406575cc2eb","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"adadf4192f700bca82abfda9fa6d58c0bf37cc04","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"c40e0b4fa365969e67011529eabdfb66d1022256","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"649bc7df3e5d7be6f7996a95084037dbf3cad1e5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events.c"]}],"references":["https://git.kernel.org/stable/c/c1a4fb7aa290f158d50654d640292e49d9055fd1","https://git.kernel.org/stable/c/42ccb215ef0a552acbbd32f81009bfe4b278ba77","https://git.kernel.org/stable/c/98d06fb9865a490e12ebe32d65b9ffac6108614d","https://git.kernel.org/stable/c/ceb1707aef5824cf024eb82d10787b7621e2ff35","https://git.kernel.org/stable/c/12a499f741fc5be3731c8b0a0d909406575cc2eb","https://git.kernel.org/stable/c/adadf4192f700bca82abfda9fa6d58c0bf37cc04","https://git.kernel.org/stable/c/c40e0b4fa365969e67011529eabdfb66d1022256","https://git.kernel.org/stable/c/649bc7df3e5d7be6f7996a95084037dbf3cad1e5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89749.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89749","state":"PUBLISHED","datePublished":"2026-09-11T19:46:53.822Z","dateUpdated":"2026-10-19T08:52:03.128Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.762Z"},"containers":{"cna":{"title":"tracing: Fix crash passing ERR_PTR to kthread_stop()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix crash passing ERR_PTR to kthread_stop()\n\nevent_test_stuff() calls kthread_run() and unconditionally passes the\nreturned task_struct pointer to kthread_stop(). kthread_run() returns an\nerror pointer such as ERR_PTR(-ENOMEM) when kthread creation fails, for\nexample under memory pressure during the boot-time event self-test.\nkthread_stop() then dereferences the invalid pointer, crashing the kernel.\n\nCheck the result of kthread_run() before passing it to kthread_stop(). Use\nWARN_ON() so that a failure to create the self-test thread does not go\nunnoticed, matching the ring-buffer self-test fix in commit\n91542863abad (\"ring-buffer: Fix crash passing ERR_PTR to kthread_stop()\")."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"c1a4fb7aa290f158d50654d640292e49d9055fd1","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"42ccb215ef0a552acbbd32f81009bfe4b278ba77","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"98d06fb9865a490e12ebe32d65b9ffac6108614d","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"ceb1707aef5824cf024eb82d10787b7621e2ff35","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"12a499f741fc5be3731c8b0a0d909406575cc2eb","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"adadf4192f700bca82abfda9fa6d58c0bf37cc04","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"c40e0b4fa365969e67011529eabdfb66d1022256","versionType":"git"},{"version":"e6187007d6c365b551c69ea3df46f06fd1c8bd19","status":"affected","lessThan":"649bc7df3e5d7be6f7996a95084037dbf3cad1e5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c1a4fb7aa290f158d50654d640292e49d9055fd1"},{"url":"https://git.kernel.org/stable/c/42ccb215ef0a552acbbd32f81009bfe4b278ba77"},{"url":"https://git.kernel.org/stable/c/98d06fb9865a490e12ebe32d65b9ffac6108614d"},{"url":"https://git.kernel.org/stable/c/ceb1707aef5824cf024eb82d10787b7621e2ff35"},{"url":"https://git.kernel.org/stable/c/12a499f741fc5be3731c8b0a0d909406575cc2eb"},{"url":"https://git.kernel.org/stable/c/adadf4192f700bca82abfda9fa6d58c0bf37cc04"},{"url":"https://git.kernel.org/stable/c/c40e0b4fa365969e67011529eabdfb66d1022256"},{"url":"https://git.kernel.org/stable/c/649bc7df3e5d7be6f7996a95084037dbf3cad1e5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:52:03.128Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}