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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d395a78db9eabd12633b39e05c80e803543b6590 to < 3299c3905f3fb439ebd892658b87bc76c93ae116affectedd395a78db9eabd12633b39e05c80e803543b6590 to < 9a998cc1c348769262d433acb7d238c5fac4b2e0affectedd395a78db9eabd12633b39e05c80e803543b6590 to < dbaf0e0023e2f9332c5164822def7f80b7d2c5efaffectedd395a78db9eabd12633b39e05c80e803543b6590 to < 3068ab802fc98b121dcb451e1f7f4d338ffc7a19affectedd395a78db9eabd12633b39e05c80e803543b6590 to < b01df98a6669d2b67d8aed816021b327fd905998affectedd395a78db9eabd12633b39e05c80e803543b6590 to < afbe4bc252d90a6f8fad869b06d5430f615f22f9affected
Linux Linux
Default version status: affected
5.14affected0 to < 5.14unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3299c3905f3fb439ebd892658b87bc76c93ae116 ↗
- https://git.kernel.org/stable/c/9a998cc1c348769262d433acb7d238c5fac4b2e0 ↗
- https://git.kernel.org/stable/c/dbaf0e0023e2f9332c5164822def7f80b7d2c5ef ↗
- https://git.kernel.org/stable/c/3068ab802fc98b121dcb451e1f7f4d338ffc7a19 ↗
- https://git.kernel.org/stable/c/b01df98a6669d2b67d8aed816021b327fd905998 ↗
- https://git.kernel.org/stable/c/afbe4bc252d90a6f8fad869b06d5430f615f22f9 ↗