CVE-2026-64831

High

Description

FFmpeg versions 8.0 through 8.1.2 contains a stack buffer overflow vulnerability in the Vulkan HEVC hardware decoder that allows remote attackers to overwrite return addresses and adjacent stack frames by supplying a crafted HEVC/H.265 bitstream. Attackers can embed a malicious vps_num_hrd_parameters value exceeding HEVC_MAX_SUB_LAYERS in any supported container format to overflow stack-allocated arrays in the vk_hevc_end_frame function, potentially achieving arbitrary code execution.

SeverityHigh

CVSS8.8

Exploit probability—

ProductFfmpeg

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-121CWE-121

How to fix

Patches

code.ffmpeg.org/FFmpeg/FFmpeg/commit/92737390dc133daadce47dd7d2ec8ef3d9ebcbed

Affected products

Product	Affected versions	Fixed in
ffmpeg ffmpeg	8.0 ≤ v ≤ 8.1.2	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.