Bug 2570385 (CVE-2026-125268)

Summary: CVE-2026-125268 ffmpeg: ffmpeg: Information disclosure via crafted CineForm HD file
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. By tricking a user into processing a specially crafted CineForm HD (CFHD) video file, an attacker can cause the decoder to read uninitialized heap memory. This issue can lead to information disclosure, allowing sensitive data residing in memory to be exposed in the decoded video output.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:55:04 UTC
FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in the CineForm HD decoder that allows attackers to leak heap memory via unzeroed idwt_tmp buffers in libavcodec/cfhd.c. Attackers can supply a crafted CFHD file with an ImageHeight tag exceeding coded band heights, causing uninitialized heap bytes to be filtered into decoded video output.