CVE-2026-90066

{"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": "2026-10-30T12:34:00.306Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:34:00.306Z"}, "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": "02866f063062dcc5686445c738be003de9787250", "status": "affected", "versionType": "git"}, {"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": "6.1.191", "lessThanOrEqual": "6.1.*", "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", "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": "6.1.191"}, {"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/02866f063062dcc5686445c738be003de9787250"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["samples/ftrace/ftrace-direct-multi-modify.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "02866f063062dcc5686445c738be003de9787250", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}, {"lessThan": "7a96b9f6d5ba23dbce66c8a4a242effd4c01a830", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}, {"lessThan": "98b7b2a29ae87937aa02ab9391543ef8c602cd94", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}, {"lessThan": "626614df9080d7052fbe24dc90b5434717ab7a9f", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}, {"lessThan": "cf839636911d8313f3ecd098329fd0b96499e4cf", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}, {"lessThan": "6727b7618f49401acf373fa3ec5712e2ec52e5cf", "status": "affected", "version": "e1067a07cfbc5a36abad3752fafe4c79e06db1bb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["samples/ftrace/ftrace-direct-multi-modify.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.16"}, {"lessThan": "5.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-90066", "lastModified": "2026-10-30T13:20:40.367", "metrics": {}, "published": "2026-09-17T17:16:55.437", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/02866f063062dcc5686445c738be003de9787250"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/626614df9080d7052fbe24dc90b5434717ab7a9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6727b7618f49401acf373fa3ec5712e2ec52e5cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a96b9f6d5ba23dbce66c8a4a242effd4c01a830"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/98b7b2a29ae87937aa02ab9391543ef8c602cd94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf839636911d8313f3ecd098329fd0b96499e4cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e1067a07cfbc5a36abad3752fafe4c79e06db1bb,7a96b9f6d5ba23dbce66c8a4a242effd4c01a830)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e1067a07cfbc5a36abad3752fafe4c79e06db1bb,98b7b2a29ae87937aa02ab9391543ef8c602cd94)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e1067a07cfbc5a36abad3752fafe4c79e06db1bb,626614df9080d7052fbe24dc90b5434717ab7a9f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e1067a07cfbc5a36abad3752fafe4c79e06db1bb,cf839636911d8313f3ecd098329fd0b96499e4cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e1067a07cfbc5a36abad3752fafe4c79e06db1bb,6727b7618f49401acf373fa3ec5712e2ec52e5cf)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T15:00:10.277336+00:00", "updated": "2026-09-20T04:45:16.990856+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}