{"api_version":"1","generated_at":"2026-09-18T01:06:22+00:00","cve":"CVE-2026-90291","urls":{"html":"https://cve.report/CVE-2026-90291","api":"https://cve.report/api/cve/CVE-2026-90291.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90291","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90291"},"summary":{"title":"module/dups: Fix use-after-free in kmod_dup_req lifetime handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmodule/dups: Fix use-after-free in kmod_dup_req lifetime handling\n\nThe kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed\nonly after it is no longer referenced. When releasing an instance, the\nkmod_dup_request_delete() function removes the kmod_dup_req from the\ndup_kmod_reqs list, waits via synchronize_rcu() and finally frees it.\nHowever, this doesn't work correctly because parallel users referencing the\ninstance in kmod_dup_request_exists_wait() don't enter an RCU read-side\ncritical section. This can result in a use-after-free.\n\nThe kmod_dup_request_exists_wait() function may need to hold a valid\nreference to a kmod_dup_req instance across a blocking wait until the\ncorresponding modprobe command completes. This makes it unsuitable for RCU.\n\nFix the issue by changing the lifecycle management of kmod_dup_req to use\nreference counting.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:26","updated_at":"2026-09-17 17:17:26"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072","name":"https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541","name":"https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca","name":"https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd","name":"https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90291","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90291","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8660484ed1cf3261e89e0bad94c6395597e87599 2c85e0fb528e039aa8ea1e9c2a1f64347f990541 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8660484ed1cf3261e89e0bad94c6395597e87599 b2709aad7599f6fd957939b60f4a8323c8f08072 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8660484ed1cf3261e89e0bad94c6395597e87599 cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8660484ed1cf3261e89e0bad94c6395597e87599 5eecb11b543f9f417bcf0dea239ff99c6af65dbd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/module/dups.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2c85e0fb528e039aa8ea1e9c2a1f64347f990541","status":"affected","version":"8660484ed1cf3261e89e0bad94c6395597e87599","versionType":"git"},{"lessThan":"b2709aad7599f6fd957939b60f4a8323c8f08072","status":"affected","version":"8660484ed1cf3261e89e0bad94c6395597e87599","versionType":"git"},{"lessThan":"cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca","status":"affected","version":"8660484ed1cf3261e89e0bad94c6395597e87599","versionType":"git"},{"lessThan":"5eecb11b543f9f417bcf0dea239ff99c6af65dbd","status":"affected","version":"8660484ed1cf3261e89e0bad94c6395597e87599","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/module/dups.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","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-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmodule/dups: Fix use-after-free in kmod_dup_req lifetime handling\n\nThe kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed\nonly after it is no longer referenced. When releasing an instance, the\nkmod_dup_request_delete() function removes the kmod_dup_req from the\ndup_kmod_reqs list, waits via synchronize_rcu() and finally frees it.\nHowever, this doesn't work correctly because parallel users referencing the\ninstance in kmod_dup_request_exists_wait() don't enter an RCU read-side\ncritical section. This can result in a use-after-free.\n\nThe kmod_dup_request_exists_wait() function may need to hold a valid\nreference to a kmod_dup_req instance across a blocking wait until the\ncorresponding modprobe command completes. This makes it unsuitable for RCU.\n\nFix the issue by changing the lifecycle management of kmod_dup_req to use\nreference counting."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:18.700Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541"},{"url":"https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072"},{"url":"https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca"},{"url":"https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd"}],"title":"module/dups: Fix use-after-free in kmod_dup_req lifetime handling","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90291","datePublished":"2026-09-17T16:08:18.700Z","dateReserved":"2026-09-11T19:38:34.798Z","dateUpdated":"2026-09-17T16:08:18.700Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:26","lastModifiedDate":"2026-09-17 17:17:26","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90291","Ordinal":"1","Title":"module/dups: Fix use-after-free in kmod_dup_req lifetime handlin","CVE":"CVE-2026-90291","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90291","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmodule/dups: Fix use-after-free in kmod_dup_req lifetime handling\n\nThe kmod dups code uses RCU to ensure that a kmod_dup_req instance is freed\nonly after it is no longer referenced. When releasing an instance, the\nkmod_dup_request_delete() function removes the kmod_dup_req from the\ndup_kmod_reqs list, waits via synchronize_rcu() and finally frees it.\nHowever, this doesn't work correctly because parallel users referencing the\ninstance in kmod_dup_request_exists_wait() don't enter an RCU read-side\ncritical section. This can result in a use-after-free.\n\nThe kmod_dup_request_exists_wait() function may need to hold a valid\nreference to a kmod_dup_req instance across a blocking wait until the\ncorresponding modprobe command completes. This makes it unsuitable for RCU.\n\nFix the issue by changing the lifecycle management of kmod_dup_req to use\nreference counting.","Type":"Description","Title":"module/dups: Fix use-after-free in kmod_dup_req lifetime handlin"}]}}}