{"id":"CVE-2026-31473","summary":"media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex","details":"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.","modified":"2026-05-18T05:59:49.931412399Z","published":"2026-04-22T13:54:00.970Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31473.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1a0d9083c24fbd5d22f7100f09d11e4d696a5f01"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2c685e99efb3b3bd2b78699fba6b1cf321975db0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/331242998a7ade5c2f65e14988901614629f3db5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/585fd9a2063dacce8b2820f675ef23d5d17434c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/72b9e81e0203f03c40f3adb457f55bd4c8eb112d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bef4f4a88b73e4cc550d25f665b8a9952af22773"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf2023e84f0888f96f4b65dc0804e7f3651969c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8549a453d5bdc0a71de66ad47a1106703406a56"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31473.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31473"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6093d3002eabd7c2913d97f1d1f4ce34b072acf9"},{"fixed":"331242998a7ade5c2f65e14988901614629f3db5"},{"fixed":"2c685e99efb3b3bd2b78699fba6b1cf321975db0"},{"fixed":"585fd9a2063dacce8b2820f675ef23d5d17434c5"},{"fixed":"1a0d9083c24fbd5d22f7100f09d11e4d696a5f01"},{"fixed":"d8549a453d5bdc0a71de66ad47a1106703406a56"},{"fixed":"72b9e81e0203f03c40f3adb457f55bd4c8eb112d"},{"fixed":"cf2023e84f0888f96f4b65dc0804e7f3651969c1"},{"fixed":"bef4f4a88b73e4cc550d25f665b8a9952af22773"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31473.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.131"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31473.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}