Buffer overflow in Ffmpeg
CVE-2026-65704
FFmpeg through 8.1.2 contains an out-of-bounds write vulnerability that allows attackers to cause heap corruption by supplying a crafted ffconcat file processed with the -safe 0 flag. The TY demuxer's demux_audio() function decrements pack…
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Ffmpeg — versions 0, de771bd52774a52d45b0e2c82e56995a1ef40df7
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-65704?
- CVE-2026-65704 is a high-severity vulnerability in Ffmpeg, classified under Integer Underflow. CVSS score: 7.8/10. Published 2026-07-23.
- How severe is CVE-2026-65704?
- High severity. CVSS v3 base score is 7.8 out of 10.