What’s Vulnerable › Vulnerabilities

CVE-2026-65703: FFmpeg 2.7 - 8.1.2 Out-of-Bounds Write in TDSC Video Decoder

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-24
• Weakness: CWE-787

Description

FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution.

Affected products

• FFmpeg: from 2.7 through 8.1.2

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/fd3ee52fab34d98a95b787d0b5ff45685766200c
• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23773
• https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-tdsc-video-decoder

Get alerted when CVE-2026-65703 or the next vulnerability affects your stack