CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of AV1 frames in the Rockchip VPU981 decoder, where improper indexing can lead to out-of-bounds memory access if a frame claims more tiles than the submitted entry count or exceeds the maximum allowed tiles. This could potentially result in memory corruption or denial of service, impacting system stability and security. Organizations using Linux systems with Rockchip hardware should prioritize addressing this vulnerability to mitigate risks associated with media processing.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity rockchip_vpu981_av1_dec_set_tile_info() indexes the tile group entry array by tile1 * tile_cols + tile0, reading up to tile_cols * tile_rows entries, lays out one descriptor per tile in the AV1_MAX_TILES tile_info buffer, and programs the real tile_cols / tile_rows into the hardware. The tile group entry control is a dynamic array sized to the number of entries userspace submitted, independent of tile_cols / tile_rows, so a frame that claims more tiles than entries reads past the array. A frame that claims more than AV1_MAX_TILES tiles also leaves the hardware programmed for more tiles than the descriptor buffer holds. Reject both in prepare_run(): tile_cols * tile_rows must not exceed the submitted entry count or AV1_MAX_TILES. The entry count is read via v4l2_ctrl_find() (ctrl->elems). This mirrors the bound the mediatek AV1 decoder already enforces.