Vulnerability record · CVE-2026-64831 · published 22 July 2026

CVE-2026-64831: Ffmpeg stack-based buffer overflow vulnerability

Ffmpeg · Ffmpeg

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.

8.7 CVSS 4.0 High EPSS 0.85% · top 43.5% CWE-121 · Stack-based buffer overflow

8.7CVSS 4.0 base score

0.85%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

28 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Ffmpeg Ffmpeg

References

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

Track CVE-2026-64831 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2013-0864Ffmpeg vulnerabilityThe gif_copy_img_rect function in libavcodec/gifdec.c in FFmpeg before 1.1.2 performs an incorrect calculation for an "end pointer," which allows rem…EPSS 2.8%23 Nov 2013 10.0CVE-2013-0872Ffmpeg memory buffer overflow vulnerabilityThe swr_init function in libswresample/swresample.c in FFmpeg before 1.1.3 allows remote attackers to have an unspecified impact via an invalid or un…EPSS 2.8%23 Nov 2013 10.0CVE-2013-0873Ffmpeg improper input validation vulnerabilityThe read_header function in libavcodec/shorten.c in FFmpeg before 1.1.3 allows remote attackers to have an unspecified impact via an invalid channel …EPSS 2.8%23 Nov 2013 10.0CVE-2013-4265Ffmpeg vulnerabilityThe av_reallocp_array function in libavutil/mem.c in FFmpeg before 2.0.1 has an unspecified impact and remote vectors related to a "wrong return code…EPSS 2.5%23 Nov 2013 10.0CVE-2011-3937Ffmpeg vulnerabilityThe H.263 codec (libavcodec/h263dec.c) in FFmpeg 0.7.x before 0.7.12, 0.8.x before 0.8.11, and unspecified versions before 0.10, and in Libav 0.5.x b…EPSS 2.3%5 Jan 2013 10.0CVE-2012-2797Ffmpeg vulnerabilityUnspecified vulnerability in the decode_frame_mp3on4 function in libavcodec/mpegaudiodec.c in FFmpeg before 0.11 and Libav 0.8.x before 0.8.5 has unk…EPSS 2.6%10 Sep 2012 10.0CVE-2012-2798Libav vulnerabilityUnspecified vulnerability in the decode_dds1 function in libavcodec/dfa.c in FFmpeg before 0.11, and Libav 0.7.x before 0.7.7 and 0.8.x before 0.8.4,…EPSS 2.9%10 Sep 2012 10.0CVE-2012-2799Ffmpeg vulnerabilityUnspecified vulnerability in libavcodec/wmalosslessdec.c in FFmpeg before 0.11 has unknown impact and attack vectors, related to the "put bit buffer …EPSS 2.5%10 Sep 2012

Source: NIST National Vulnerability Database (record CVE-2026-64831), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.