CVE-2026-97576 media: v4l2-ctrls: validate HEVC tile counts
A missing validation in the Linux kernel HEVC decoder allows attackers to cause a denial of service via crafted tile counts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97576?
CVE-2026-97576 is a high-severity vulnerability in Linux, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
media: v4l2-ctrls: validate HEVC tile counts
The stateless HEVC decoders read num_tile_columns_minus1 + 1 entries from column_width_minus1[] and num_tile_rows_minus1 + 1 from row_height_minus1[] and use them as tile-loop bounds, but std_validate_compound() does not bound these u8 counts. Reject a V4L2_CTRL_TYPE_HEVC_PPS with tiling enabled whose tile counts exceed the uAPI array capacity, mirroring the existing compound-control range checks.
Which versions are affected by CVE-2026-97576?
How do I fix CVE-2026-97576?
Apply the vendor's patch.
Is CVE-2026-97576 being exploited?
There is no known exploitation of CVE-2026-97576 in the wild and no public exploit code.
Sources
Also known as AZL-104399, BELL-CVE-2026-97576, DEBIAN-CVE-2026-97576, GHSA-f66p-93rc-m283, UBUNTU-CVE-2026-97576.