High [CVE-2026-75142] Stack Buffer Overflow in MPEG-PS Muxer
This high-severity Red Hat Linux advisory covers CVE-2026-75142 affecting Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI).
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Summary
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. A flaw was found in FFmpeg.
A local attacker or a user processing a specially crafted file with an excessive number of streams could trigger this flaw, leading to a buffer overflow. This could potentially result in denial of service or arbitrary code execution.
The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images.
The vulnerable code resides in the MPEG-PS muxer (libavformat/mpegenc.c), which is compiled and shipped in all FFmpeg builds across these products. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-120. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI).
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Mitigation checklist
- No mitigation is currently available for this flaw.
Official advisory · high-confidence parse· fetched 52 minutes ago·verify at source
Discussion(0)
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