Bug 2570515 (CVE-2026-125184)

Summary: CVE-2026-125184 ffmpeg: FFmpeg: Information disclosure via crafted video frames in CamStudio 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's CamStudio video decoder. When handling compressed video streams that decompress to fewer bytes than the expected frame size, the decoder copies uninitialized memory into the decoded output. An attacker could exploit this vulnerability by enticing a user or automated service to process a specially crafted video file, resulting in information disclosure through the leakage of sensitive memory contents.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 20:04:06 UTC
FFmpeg 6.1 through 9.0.2 contains an information disclosure vulnerability in the CamStudio decoder (libavcodec/cscd.c) that copies uninitialized heap memory into decoded frames when decompressed payloads are short. Attackers can supply a crafted AVI with a CSCD stream whose LZO or zlib frames decompress to fewer bytes than the frame size, recovering heap contents from the decoded or re-encoded output.