CVE-2026-31473
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | forky | fixed | 6.19.11-1 |
| debian | sid | fixed | 6.19.11-1 |
| debian | trixie | fixed | 6.12.85-1 |
| debian | bullseye | fixed | 6.1.170-1~deb11u1 |
| linux-kernel | affected | 5.10.253 | |
| linux-kernel | 4.20 | affected | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/1a0d9083c24fbd5d22f7100f09d11e4d696a5f01
- https://git.kernel.org/stable/c/2c685e99efb3b3bd2b78699fba6b1cf321975db0
- https://git.kernel.org/stable/c/331242998a7ade5c2f65e14988901614629f3db5
- https://git.kernel.org/stable/c/585fd9a2063dacce8b2820f675ef23d5d17434c5
- https://git.kernel.org/stable/c/72b9e81e0203f03c40f3adb457f55bd4c8eb112d
- https://git.kernel.org/stable/c/bef4f4a88b73e4cc550d25f665b8a9952af22773
- https://git.kernel.org/stable/c/cf2023e84f0888f96f4b65dc0804e7f3651969c1
- https://git.kernel.org/stable/c/d8549a453d5bdc0a71de66ad47a1106703406a56
- https://www.suse.com/security/cve/CVE-2026-31473.html
- https://security-tracker.debian.org/tracker/CVE-2026-31473
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.