Vulnerability 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.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/3068ab802fc98b121dcb451e1f7f4d338ffc7a19
- https://git.kernel.org/stable/c/3299c3905f3fb439ebd892658b87bc76c93ae116
- https://git.kernel.org/stable/c/9a998cc1c348769262d433acb7d238c5fac4b2e0
- https://git.kernel.org/stable/c/afbe4bc252d90a6f8fad869b06d5430f615f22f9
- https://git.kernel.org/stable/c/b01df98a6669d2b67d8aed816021b327fd905998
- https://git.kernel.org/stable/c/dbaf0e0023e2f9332c5164822def7f80b7d2c5ef
FAQ
What is CVE-2026-68206?
CVE-2026-68206 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 ...
How severe is CVE-2026-68206?
CVE-2026-68206 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-68206?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.