Riskcovery

CVE-2026-68206

media: v4l2-ctrls: validate HEVC active reference counts

State
Published
Severity
7.8 High
Published
Aug 10, 2026
Updated
Oct 19, 2026
Reserved
Jul 30, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

media: v4l2-ctrls: validate HEVC active reference counts

HEVC slice parameters are shared stateless V4L2 controls, but the common validation path does not verify the active L0/L1 reference counts before driver-specific code consumes them.

The original report came from Cedrus, but the active count bounds are not Cedrus-specific. Validate them in the common HEVC slice control path so stateless HEVC drivers get the same basic guarantees as soon as the control is queued.

Do not reject ref_idx_l0/ref_idx_l1 entries here. Existing userspace may use out-of-range sentinel values such as 0xff for missing references, and some hardware can use that information for concealment. Keep this common check limited to the active reference counts.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

  • CWE-20 Improper Input Validation

Affected Products

ProductVersions
LinuxLinux
  • d395a78db9eabd12633b39e05c80e803543b6590 to before 3299c3905f3fb439ebd892658b87bc76c93ae116Affected
  • d395a78db9eabd12633b39e05c80e803543b6590 to before 9a998cc1c348769262d433acb7d238c5fac4b2e0Affected
  • d395a78db9eabd12633b39e05c80e803543b6590 to before dbaf0e0023e2f9332c5164822def7f80b7d2c5efAffected
  • d395a78db9eabd12633b39e05c80e803543b6590 to before 3068ab802fc98b121dcb451e1f7f4d338ffc7a19Affected
  • d395a78db9eabd12633b39e05c80e803543b6590 to before b01df98a6669d2b67d8aed816021b327fd905998Affected
  • d395a78db9eabd12633b39e05c80e803543b6590 to before afbe4bc252d90a6f8fad869b06d5430f615f22f9Affected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 6.1.183 through 6.1.*Not affected
  • 6.6.148 through 6.6.*Not affected
  • 6.12.101 through 6.12.*Not affected
  • 6.18.42 through 6.18.*Not affected
  • 7.1.6 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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