What is CVE-2026-64831?

CVE-2026-64831 is a high-severity vulnerability in Ffmpeg, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-07-22.

How severe is CVE-2026-64831?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Ffmpeg

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 bit…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ffmpeg — versions 8.0, 92737390dc133daadce47dd7d2ec8ef3d9ebcbed

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-64831?: CVE-2026-64831 is a high-severity vulnerability in Ffmpeg, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-07-22.
How severe is CVE-2026-64831?: High severity. CVSS v3 base score is 8.8 out of 10.