CVE-2026-64831: Ffmpeg

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• Ffmpeg Ffmpeg: from 8.0, up to and including 8.1.2

Published 2026-07-22. Last modified 2026-07-28.