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

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-31473

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-31473

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "331242998a7ade5c2f65e14988901614629f3db5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "2c685e99efb3b3bd2b78699fba6b1cf321975db0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "585fd9a2063dacce8b2820f675ef23d5d17434c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "1a0d9083c24fbd5d22f7100f09d11e4d696a5f01",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "d8549a453d5bdc0a71de66ad47a1106703406a56",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "72b9e81e0203f03c40f3adb457f55bd4c8eb112d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "cf2023e84f0888f96f4b65dc0804e7f3651969c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6093d3002eabd7c2913d97f1d1f4ce34b072acf9",
        "lessThan": "bef4f4a88b73e4cc550d25f665b8a9952af22773",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/mc/mc-request.c",
      "drivers/media/v4l2-core/v4l2-ioctl.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.20"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.168",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.131",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.80",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.21",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.11",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/mc/mc-request.c",
      "drivers/media/v4l2-core/v4l2-ioctl.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31473

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39888 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-31473 · Revision 1Source updated