Bug 2570888 (CVE-2026-125176)

Summary: CVE-2026-125176 ffmpeg: ffmpeg: Information disclosure via uninitialized memory read in Flash Screen Video decoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
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. This vulnerability allows an attacker to cause an information disclosure by providing a specially crafted Flash Screen Video file. When decoding the malformed video stream, the application reads uninitialized memory past the decompressed data buffer. Consequently, fragments of sensitive heap memory can be leaked into the decoded video output frames.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-10 20:28:51 UTC
FFmpeg through 9.0.2 contains an uninitialized memory read vulnerability in decode_hybrid() in libavcodec/flashsv.c that reads past decompressed data when decoding 15-bit color pixels. Attackers can supply a crafted Flash Screen Video 2 block whose inflated data ends mid-pixel to leak heap memory into decoded output frames.