{"id":"CVE-2026-90291","revision":"a516ca9f638f4362847befe0b005c6ff","records":[{"revision":"a516ca9f638f4362847befe0b005c6ff","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90291","aliases":[],"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":0,"publishedAt":"2026-09-17T16:08:18.7+00:00","modifiedAt":"2026-10-21T12:50:49.946+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/module/dups.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8660484ed1cf3261e89e0bad94c6395597e87599\",\n                            \"lessThan\": \"a3205bd1f218053575589b14caf8df667f344134\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8660484ed1cf3261e89e0bad94c6395597e87599\",\n                            \"lessThan\": \"2c85e0fb528e039aa8ea1e9c2a1f64347f990541\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8660484ed1cf3261e89e0bad94c6395597e87599\",\n                            \"lessThan\": \"b2709aad7599f6fd957939b60f4a8323c8f08072\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8660484ed1cf3261e89e0bad94c6395597e87599\",\n                            \"lessThan\": \"cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8660484ed1cf3261e89e0bad94c6395597e87599\",\n                            \"lessThan\": \"5eecb11b543f9f417bcf0dea239ff99c6af65dbd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/module/dups.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a3205bd1f218053575589b14caf8df667f344134","https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541","https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072","https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca","https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90291","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90291","identifiers":["CVE-2026-90291"]},"retained":false,"historicalAffected":[]}],"coverage":[]}