CVE-2026-31473 (GCVE-0-2026-31473)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-05-11 22:09
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


Detection rules are retrieved from Rulezet.