Bug 2569935 (CVE-2026-125229)

Summary: CVE-2026-125229 ffmpeg: FFmpeg: Denial of Service via out-of-bounds memory access in Huffyuv encoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
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 exploit this vulnerability to cause a Denial of Service (DoS) or potentially execute arbitrary code by tricking a user or system into transcoding a specially crafted video with unusually small dimensions. Due to missing validation of minimum frame dimensions in the Huffyuv video encoder, processing the malicious file triggers an out-of-bounds memory access, crashing the application or corrupting memory.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:25:41 UTC 
FFmpeg through 9.0.2 contains an out-of-bounds memory access vulnerability in the encode_frame() function of libavcodec/huffyuvenc.c, because encode_init() never validates minimum frame dimensions for the median predictor. Attackers can supply a tiny video, such as a 2-pixel-wide or 1-2-pixel-tall frame, that causes negative sub_median_pred lengths and out-of-bounds reads and writes when transcoded to huffyuv or ffvhuff, crashing the encoder.