Bug 2545188

Summary: CVE-2026-30754 ffmpeg5: FFmpeg: Arbitrary code execution via crafted H.264/HEVC RTP stream [epel-all]
Product: [Fedora] Fedora EPEL Reporter: aedmond
Component: ffmpeg5Assignee: Troy Dawson <tdawson>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: tdawson
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["cf758d77-e815-418a-b550-f0ea7ecfabc3"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2530145    

Description aedmond 2026-10-02 13:52:45 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.

A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP encoding process. In the nal_send function in libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is passed to memcpy when transmitting H.264/HEVC streams via RTP using a crafted input file. This was detected using AddressSanitizer.