media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity

Summary

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.

Timeline

1. Sep 25, 2026, 10:21 AM UTCCVE published
2. Oct 19, 2026, 9:09 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 727a400686a2c0d25015c9e44916a59b72882f83 · fixed in 95ee48eb17c91bd4859b65e0a54e7722f370d0e5; From 727a400686a2c0d25015c9e44916a59b72882f83 · fixed in 40029f7f35397853f8711d6fce1d90a4c7a01f8c; From 727a400686a2c0d25015c9e44916a59b72882f83 · fixed in a41babf528f70c9a82ed31cfb5fe19065910f7f0; From 727a400686a2c0d25015c9e44916a59b72882f83 · fixed in fd965369220cc160bb20a24991790814bfbab401; From 727a400686a2c0d25015c9e44916a59b72882f83 · fixed in 367db8b23c26a913d76ed70457bbcd781c422b49

• Linux Linux

  6.5

• KernelLinux

  From 6.5.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7

References 5