CVE-2026-31473

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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.10% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-25)

CWEs

CWE-416, CWE-362

Published

2026-04-22

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

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

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