Bug 2570816 (CVE-2026-125100)

Summary: CVE-2026-125100 ffmpeg: ffmpeg: Information disclosure via OpenEXR decoder integer overflow
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 flaw allows an attacker to trigger an information disclosure through an integer overflow in the OpenEXR image decoder. By supplying a crafted OpenEXR image with large dimensions and small tile sizes, an attacker can cause the decoder to miscalculate block counts and skip decoding operations, exposing uninitialized memory or stale frame data.
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Description OSIDB Bzimport 2026-11-10 20:24:21 UTC
FFmpeg through 9.0.2 contains an integer overflow vulnerability in the OpenEXR decoder's decode_frame() in libavcodec/exr.c that miscalculates the tiled block count. Attackers can supply a crafted tiled OpenEXR image with large dimensions and small tiles to skip decoding and disclose uninitialized memory or stale frame data.