CVE-2026-68206

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd395a78db9eabd12633b39e05c80e803543b6590 < 9a998cc1c348769262d433acb7d238c5fac4b2e0affected
LinuxLinuxd395a78db9eabd12633b39e05c80e803543b6590 < dbaf0e0023e2f9332c5164822def7f80b7d2c5efaffected
LinuxLinuxd395a78db9eabd12633b39e05c80e803543b6590 < 3068ab802fc98b121dcb451e1f7f4d338ffc7a19affected
LinuxLinuxd395a78db9eabd12633b39e05c80e803543b6590 < b01df98a6669d2b67d8aed816021b327fd905998affected
LinuxLinuxd395a78db9eabd12633b39e05c80e803543b6590 < afbe4bc252d90a6f8fad869b06d5430f615f22f9affected
LinuxLinux5.14affected
LinuxLinux0 < 5.14unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References