CVE-2026-65703

High

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.

SeverityHigh

CVSS7.8

Exploit probability27. percentile0.3%

ProductFfmpeg

PublishedJul 23, 2026

First seenJul 23, 2026

Weakness typeCWE-787Out-of-bounds write

How to fix

Patches

code.ffmpeg.org/FFmpeg/FFmpeg/commit/fd3ee52fab34d98a95b787d0b5ff45685766200c

Affected products

Product	Affected versions	Fixed in
ffmpeg ffmpeg	2.7 ≤ v ≤ 8.1.2	—

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