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CVE-2026-97576: media: v4l2-ctrls: validate HEVC tile counts

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.5 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/400cd78a63cc647412cf069c9851bdea2818340c
• https://git.kernel.org/stable/c/724915535558b14c111ad8a498b896026dfe8d20
• https://git.kernel.org/stable/c/975e0180488966bb709092a52408604bd4f4edd9
• https://git.kernel.org/stable/c/9c0a718e24d4cd6d975f3df9740f968f62891a20
• https://git.kernel.org/stable/c/ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f
• https://git.kernel.org/stable/c/c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34
• https://git.kernel.org/stable/c/dc694a9929f7cb9c88ef91e45eb982b7bbe5a477

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