CVE-2026-64831

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/92737390dc133daadce47dd7d2ec8ef3d9ebcbed	Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23665	Issue Tracking Patch
https://www.vulncheck.com/advisories/ffmpeg-stack-buffer-overflow-in-vulkan-hevc-decoder	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

History

28 Jul 2026, 17:00

Type	Values Removed	Values Added
CPE		cpe:2.3:a:ffmpeg:ffmpeg::::::::
First Time		Ffmpeg Ffmpeg ffmpeg
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/92737390dc133daadce47dd7d2ec8ef3d9ebcbed -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/92737390dc133daadce47dd7d2ec8ef3d9ebcbed - Patch
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23665 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23665 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/ffmpeg-stack-buffer-overflow-in-vulkan-hevc-decoder -~~	() https://www.vulncheck.com/advisories/ffmpeg-stack-buffer-overflow-in-vulkan-hevc-decoder - Third Party Advisory

22 Jul 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-22 17:16

Updated : 2026-07-28 17:00

NVD link : CVE-2026-64831

Mitre link : CVE-2026-64831

CVE.ORG link : CVE-2026-64831

JSON object : View

Products Affected

ffmpeg

ffmpeg

CWE

CWE-121

Stack-based Buffer Overflow

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