{"id":"CVE-2026-31473","revision":"73641a6b2543439488355fb5391f1633","records":[{"revision":"73641a6b2543439488355fb5391f1633","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31473","aliases":[],"title":"media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex\n\nMEDIA_REQUEST_IOC_REINIT can run concurrently with VIDIOC_REQBUFS(0)\nqueue teardown paths. This can race request object cleanup against vb2\nqueue cancellation and lead to use-after-free reports.\n\nWe already serialize request queueing against STREAMON/OFF with\nreq_queue_mutex. Extend that serialization to REQBUFS, and also take\nthe same mutex in media_request_ioctl_reinit() so REINIT is in the\nsame exclusion domain.\n\nThis keeps request cleanup and queue cancellation from running in\nparallel for request-capable devices.","state":0,"publishedAt":"2026-04-22T13:54:00.97+00:00","modifiedAt":"2026-10-19T18:35:50.197+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                        \"drivers/media/mc/mc-request.c\",\n                        \"drivers/media/v4l2-core/v4l2-ioctl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"331242998a7ade5c2f65e14988901614629f3db5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"2c685e99efb3b3bd2b78699fba6b1cf321975db0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"585fd9a2063dacce8b2820f675ef23d5d17434c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"1a0d9083c24fbd5d22f7100f09d11e4d696a5f01\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"d8549a453d5bdc0a71de66ad47a1106703406a56\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"72b9e81e0203f03c40f3adb457f55bd4c8eb112d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"cf2023e84f0888f96f4b65dc0804e7f3651969c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6093d3002eabd7c2913d97f1d1f4ce34b072acf9\",\n                            \"lessThan\": \"bef4f4a88b73e4cc550d25f665b8a9952af22773\",\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                        \"drivers/media/mc/mc-request.c\",\n                        \"drivers/media/v4l2-core/v4l2-ioctl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.20\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.253\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.203\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.168\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.131\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.80\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.21\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.11\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\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/331242998a7ade5c2f65e14988901614629f3db5","https://git.kernel.org/stable/c/2c685e99efb3b3bd2b78699fba6b1cf321975db0","https://git.kernel.org/stable/c/585fd9a2063dacce8b2820f675ef23d5d17434c5","https://git.kernel.org/stable/c/1a0d9083c24fbd5d22f7100f09d11e4d696a5f01","https://git.kernel.org/stable/c/d8549a453d5bdc0a71de66ad47a1106703406a56","https://git.kernel.org/stable/c/72b9e81e0203f03c40f3adb457f55bd4c8eb112d","https://git.kernel.org/stable/c/cf2023e84f0888f96f4b65dc0804e7f3651969c1","https://git.kernel.org/stable/c/bef4f4a88b73e4cc550d25f665b8a9952af22773"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31473","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31473","identifiers":["CVE-2026-31473"]},"retained":false,"historicalAffected":[]}],"coverage":[]}