Bug 2569567 (CVE-2026-125245)

Summary: CVE-2026-125245 ffmpeg: ffmpeg: Denial of Service via memory leak in MJPEG decoding
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 exploit this vulnerability by providing a crafted Motion JPEG (MJPEG) stream containing repeated Start of Frame (SOF) markers or malformed frames during hardware-accelerated decoding. This issue causes allocated memory buffers to be overwritten without being released, resulting in a progressive memory leak that can lead to a Denial of Service (DoS) through memory exhaustion.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 13:04:55 UTC
FFmpeg through 9.0.2 contains a memory leak vulnerability in ff_mjpeg_decode_sof() in libavcodec/mjpegdec.c, which overwrites the hwaccel_picture_private pointer without freeing it. Attackers can supply crafted MJPEG streams with repeated SOF markers or failing frames to leak hwaccel private data and hardware buffers under VAAPI or NVDEC decoding.