CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of HEVC slice parameters within the V4L2 controls, where insufficient validation of active L0/L1 reference counts can lead to potential misuse by driver-specific code. This oversight may allow for improper processing of video data, potentially impacting system stability or security. Organizations utilizing Linux-based systems with HEVC video processing should prioritize addressing this vulnerability to ensure robust media handling and prevent exploitation.
Original NVD 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.