High severity · published Jul 22, 2026
CVE-2026-64831
FFmpeg 8.0 - 8.1.2 Stack Buffer Overflow in Vulkan HEVC Decoder
8.8
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
FFmpeg · FFmpeg
8.0 through 8.1.2; 92737390dc133daadce47dd7d2ec8ef3d9ebcbed · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64831
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64831
Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/92737390dc133daadce47dd7d2ec8ef3d9ebcbed
Issue Tracking
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23665
Third Party Advisory
https://www.vulncheck.com/advisories/ffmpeg-stack-buffer-overflow-in-vulkan-hevc-decoder
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