Description
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-ctrls: validate AV1 tile counts The stateless AV1 decoders use tile_info.tile_cols and tile_rows as loop bounds and as indices into the mi_*_starts[] and *_in_sbs_minus_1[] arrays, as the divisor for context_update_tile_id, and their product bounds the per-tile descriptor buffers, but std_validate_compound() does not bound these u8 fields. Reject a V4L2_CTRL_TYPE_AV1_FRAME whose tile_cols or tile_rows exceeds V4L2_AV1_MAX_TILE_COLS / _ROWS, or whose product exceeds V4L2_AV1_MAX_TILE_COUNT. A zero tile count is left to the consuming driver so the zero-initialised control that existing userspace submits is still accepted.
References5
- git.kernel.org/stable/c/1afaf85c4990fb1e3168d0d6e99246a65e526f1b
- git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0
- git.kernel.org/stable/c/85df9fc79b07f1cc7c953f930ae7e675d0c1e820
- git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8
- git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.