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  4. CVE 2026 75142 ffmpeg stack buffer overflow in mpeg ps muxer via
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Back to active CVEs
High · CVSS 7.8CVE-2026-75142

FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c

Answer in brief

CVE-2026-75142 records a High severity (CVSS 7.8) vulnerability in FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c. The current sources do not mark it as known exploited. The current feed maps FFmpeg/FFmpeg (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2026Updated Sep 9, 2026Source checked Oct 3, 2026First seen by HOL Aug 19, 2026Material review Sep 9, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FFmpeg/FFmpeg (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
FFmpeg/FFmpeggeneric>=0 <9d786e4b5e9b8482651928574de33772aeee7be19d786e4b5e9b8482651928574de33772aeee7be1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for FFmpeg/FFmpeg.
  2. 2Review the reported fix. Update FFmpeg/FFmpeg to 9d786e4b5e9b8482651928574de33772aeee7be1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 19, 2026

Sources and claim methodology

  • Source referencecode.ffmpeg.org
  • Source referencecode.ffmpeg.org
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-121
Source
CVE List V5
Source checked
Oct 3, 2026
References
3 linked sources
Open source record