CVE-2026-75142 is a vulnerability in FFmpeg
Published on August 19, 2026
FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c
FFmpeg before commit 9d786e4 contains a stack buffer overflow in the MPEG-PS muxer (libavformat/mpegenc.c). When muxing input with more streams than the muxer's fixed-size stack buffer accommodates, the buffer is overflowed. A crafted input with an excessive number of streams triggers the overflow during MPEG-PS muxing.
Vulnerability Analysis
CVE-2026-75142 is exploitable with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-75142 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-75142
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Affected Versions
FFmpeg:- Before 9d786e4b5e9b8482651928574de33772aeee7be1 is affected.