media: v4l2-ctrls: validate HEVC active reference counts

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68206
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:08 UTC
Updated2026-08-19 17:20:36 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001750000 probability, percentile 0.073360000 (date 2026-08-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 3299c3905f3fb439ebd892658b87bc76c93ae116 git Not specified
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 9a998cc1c348769262d433acb7d238c5fac4b2e0 git Not specified
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 dbaf0e0023e2f9332c5164822def7f80b7d2c5ef git Not specified
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 3068ab802fc98b121dcb451e1f7f4d338ffc7a19 git Not specified
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 b01df98a6669d2b67d8aed816021b327fd905998 git Not specified
CNA Linux Linux affected d395a78db9eabd12633b39e05c80e803543b6590 afbe4bc252d90a6f8fad869b06d5430f615f22f9 git Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3068ab802fc98b121dcb451e1f7f4d338ffc7a19 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b01df98a6669d2b67d8aed816021b327fd905998 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3299c3905f3fb439ebd892658b87bc76c93ae116 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/afbe4bc252d90a6f8fad869b06d5430f615f22f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dbaf0e0023e2f9332c5164822def7f80b7d2c5ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9a998cc1c348769262d433acb7d238c5fac4b2e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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