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CVE-2026-31473

media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex

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.

Timeline

  1. ID reserved

    By Linux

  2. · 44 days later

    Published

  3. · 6 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-31473, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.10% · top 99% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < 331242998a7ade5c2f65e14988901614629f3db5
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < 2c685e99efb3b3bd2b78699fba6b1cf321975db0
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < 585fd9a2063dacce8b2820f675ef23d5d17434c5
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < 1a0d9083c24fbd5d22f7100f09d11e4d696a5f01
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < d8549a453d5bdc0a71de66ad47a1106703406a56
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < 72b9e81e0203f03c40f3adb457f55bd4c8eb112d
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < cf2023e84f0888f96f4b65dc0804e7f3651969c1
    • affected 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 – < bef4f4a88b73e4cc550d25f665b8a9952af22773
  • Linux · Linux

    • affected 4.20
    • unaffected < 4.20
    • unaffected 5.10.253 – ≤ 5.10.*
    • unaffected 5.15.203 – ≤ 5.15.*
    • unaffected 6.1.168 – ≤ 6.1.*
    • unaffected 6.6.131 – ≤ 6.6.*
    • unaffected 6.12.80 – ≤ 6.12.*
    • unaffected 6.18.21 – ≤ 6.18.*
    • unaffected 6.19.11 – ≤ 6.19.*
    • unaffected 7.0 – ≤ *

References

References8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .