High severity · published Aug 19, 2026
CVE-2026-75142
FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
FFmpeg · FFmpeg
before 9d786e4b5e9b8482651928574de33772aeee7be1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75142
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75142
code.ffmpeg.org
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/9d786e4b5e9b8482651928574de33772aeee7be1
code.ffmpeg.org
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24087
www.vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-stack-buffer-overflow-in-mpeg-ps-muxer-via-mpegenc-c
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