Bug 2519760 (CVE-2026-75144)

Summary: CVE-2026-75144 ffmpeg: FFmpeg: Memory corruption via crafted Dirac data unit
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin, gtanzill, jbuscemi
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FFmpeg. Attackers can trigger memory corruption in the VC-2/Dirac RTP packetizer by supplying a specially crafted Dirac data unit. This heap buffer overflow occurs because the packetizer copies input data into a fixed-size buffer without proper size validation. This can lead to a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2525518, 2525519    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-19 16:53:20 UTC 
FFmpeg before commit 1cdeb3c contains a heap buffer overflow vulnerability in the VC-2/Dirac RTP packetizer (libavformat/rtpenc_vc2hq.c) that allows attackers to trigger memory corruption by supplying a crafted Dirac data unit. The packetizer copies an input-derived data unit or fragment size into a fixed-size buffer without an upper bound check, causing a heap buffer overflow when the crafted input is packetized for RTP output.