CVE-2026-31473 (GCVE-0-2026-31473)
Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54
VLAI?
Title
media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < 331242998a7ade5c2f65e14988901614629f3db5
(git)
Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < 2c685e99efb3b3bd2b78699fba6b1cf321975db0 (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < 585fd9a2063dacce8b2820f675ef23d5d17434c5 (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < 1a0d9083c24fbd5d22f7100f09d11e4d696a5f01 (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < d8549a453d5bdc0a71de66ad47a1106703406a56 (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < 72b9e81e0203f03c40f3adb457f55bd4c8eb112d (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < cf2023e84f0888f96f4b65dc0804e7f3651969c1 (git) Affected: 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 , < bef4f4a88b73e4cc550d25f665b8a9952af22773 (git) |
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{
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"drivers/media/mc/mc-request.c",
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"version": "0",
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{
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{
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"version": "6.6.131",
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{
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"value": "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."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-22T13:54:00.970Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
"url": "https://git.kernel.org/stable/c/bef4f4a88b73e4cc550d25f665b8a9952af22773"
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"title": "media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex",
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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