Bug 2525520

Summary:	CVE-2026-75142 ffmpeg: FFmpeg: Stack Buffer Overflow in MPEG-PS Muxer [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Thibault Guittet <tguittet>
Component:	ffmpeg	Assignee:	Multimedia SIG <multimedia-sig>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	epel10	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:		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 09:15:55 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.