Bug 2525521

Summary:	CVE-2026-75142 ffmpeg: FFmpeg: Stack Buffer Overflow in MPEG-PS Muxer [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Thibault Guittet <tguittet>
Component:	ffmpeg	Assignee:	Multimedia SIG <multimedia-sig>
Status:	ASSIGNED ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	43	CC:	asn, development.group, dominik, multimedia-sig, ngompa13
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["fde72f52-c1b1-448f-8a60-44d1a4b40758"]}
Fixed In Version:	ffmpeg-9.0.1-1.fc46,ffmpeg-9.0.1-4.fc45,ffmpeg-8.1.3-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2519759

Description Thibault Guittet 2026-08-28 09:16:00 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Dominik 'Rathann' Mierzejewski 2026-09-29 07:06:55 UTC

Fixed in:
9.0.1: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b274f0d21ba684446fd59b49e00f3f8e9ed954df
8.1.3: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/3193e032015543806e6b24d2f1eea2db76a0c527

NOT fixed in 7.1.x

Comment 2 Fedora Update System 2026-09-29 07:07:18 UTC

FEDORA-2026-3e109a0c85 (ffmpeg-8.1.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e109a0c85

Comment 3 Fedora Update System 2026-10-01 01:12:31 UTC

FEDORA-2026-3e109a0c85 (ffmpeg-8.1.3-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.