Bug 2569594 (CVE-2026-125251)

Summary: CVE-2026-125251 ffmpeg: ffmpeg: Arbitrary code execution via integer overflow in VVC decoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FFmpeg. An attacker could achieve arbitrary code execution or cause a Denial of Service (DoS) due to an integer overflow vulnerability in the Versatile Video Coding (VVC) decoder. By convincing a user to process a specially crafted video file on a 32-bit system, the decoder allocates an insufficient buffer, resulting in out-of-bounds heap writes and memory corruption.
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Description OSIDB Bzimport 2026-11-10 13:09:23 UTC
FFmpeg through 9.0.2 contains an integer overflow vulnerability in the VVC decoder alloc_frame() function in libavcodec/vvc/refs.c that undersizes the reference picture list allocation on 32-bit builds. Attackers can supply a crafted VVC (H.266) file with a very large number of NAL units per access unit to trigger heap out-of-bounds writes and corrupt memory.