Answer in brief
CVE-2026-31473 records a High severity (CVSS 7.8) vulnerability in media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <331242998a7ade5c2f65e14988901614629f3db5 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <2c685e99efb3b3bd2b78699fba6b1cf321975db0 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <585fd9a2063dacce8b2820f675ef23d5d17434c5 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <1a0d9083c24fbd5d22f7100f09d11e4d696a5f01 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <d8549a453d5bdc0a71de66ad47a1106703406a56 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <72b9e81e0203f03c40f3adb457f55bd4c8eb112d || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <cf2023e84f0888f96f4b65dc0804e7f3651969c1 || >=6093d3002eabd7c2913d97f1d1f4ce34b072acf9 <bef4f4a88b73e4cc550d25f665b8a9952af22773 | 331242998a7ade5c2f65e14988901614629f3db5, 2c685e99efb3b3bd2b78699fba6b1cf321975db0, 585fd9a2063dacce8b2820f675ef23d5d17434c5, 1a0d9083c24fbd5d22f7100f09d11e4d696a5f01, d8549a453d5bdc0a71de66ad47a1106703406a56, 72b9e81e0203f03c40f3adb457f55bd4c8eb112d, cf2023e84f0888f96f4b65dc0804e7f3651969c1, bef4f4a88b73e4cc550d25f665b8a9952af22773 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 16, 2026
In the Linux kernel, the following vulnerability has been resolved: media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex MEDIA_REQUEST_IOC_REINIT can run concurrently with VIDIOC_REQBUFS(0) queue teardown paths. This can race request object cleanup against vb2 queue cancellation and lead to use-after-free reports. We already serialize request queueing against STREAMON/OFF with req_queue_mutex. Extend that serialization to REQBUFS, and also take the same mutex in media_request_ioctl_reinit() so REINIT is in the same exclusion domain. This keeps request cleanup and queue cancellation from running in parallel for request-capable devices.
Quoted source text, attributed separately from HOL analysis.