{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90066","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.784Z","datePublished":"2026-09-17T16:05:48.921Z","dateUpdated":"2026-09-17T16:05:48.921Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:05:48.921Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsamples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify\n\nftrace_direct_multi_init() assigns kthread_run()'s return value to\nsimple_tsk without an IS_ERR() check. When kthread_run() fails it\nreturns ERR_PTR(-ENOMEM), but init still returns 0, so the module loads\nwith simple_tsk holding an error pointer. On unload,\nftrace_direct_multi_exit() then passes that ERR_PTR to kthread_stop(),\nleading to a null-pointer-dereference.\n\nCheck the return value of kthread_run() with IS_ERR(); on failure,\nunregister the ftrace direct call and propagate the error code."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/ftrace/ftrace-direct-multi-modify.c"],"versions":[{"version":"e1067a07cfbc5a36abad3752fafe4c79e06db1bb","lessThan":"7a96b9f6d5ba23dbce66c8a4a242effd4c01a830","status":"affected","versionType":"git"},{"version":"e1067a07cfbc5a36abad3752fafe4c79e06db1bb","lessThan":"98b7b2a29ae87937aa02ab9391543ef8c602cd94","status":"affected","versionType":"git"},{"version":"e1067a07cfbc5a36abad3752fafe4c79e06db1bb","lessThan":"626614df9080d7052fbe24dc90b5434717ab7a9f","status":"affected","versionType":"git"},{"version":"e1067a07cfbc5a36abad3752fafe4c79e06db1bb","lessThan":"cf839636911d8313f3ecd098329fd0b96499e4cf","status":"affected","versionType":"git"},{"version":"e1067a07cfbc5a36abad3752fafe4c79e06db1bb","lessThan":"6727b7618f49401acf373fa3ec5712e2ec52e5cf","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/ftrace/ftrace-direct-multi-modify.c"],"versions":[{"version":"5.16","status":"affected"},{"version":"0","lessThan":"5.16","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"5.16","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7a96b9f6d5ba23dbce66c8a4a242effd4c01a830"},{"url":"https://git.kernel.org/stable/c/98b7b2a29ae87937aa02ab9391543ef8c602cd94"},{"url":"https://git.kernel.org/stable/c/626614df9080d7052fbe24dc90b5434717ab7a9f"},{"url":"https://git.kernel.org/stable/c/cf839636911d8313f3ecd098329fd0b96499e4cf"},{"url":"https://git.kernel.org/stable/c/6727b7618f49401acf373fa3ec5712e2ec52e5cf"}],"title":"samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify","x_generator":{"engine":"bippy-1.2.0"}}}}