Bug 2569547 (CVE-2026-125247)

Summary: CVE-2026-125247 ffmpeg: ffmpeg: information disclosure via integer overflow in DNG tile decoding
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. An integer overflow in the Digital Negative (DNG) tile decoding logic can lead to information disclosure. By tricking a user or automated service into processing a specially crafted DNG image with excessively large tile dimensions, an attacker can cause the decoding process to skip image rendering and output a frame containing uninitialized memory. This may expose sensitive data previously stored in system memory.
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Description OSIDB Bzimport 2026-11-10 13:02:16 UTC
FFmpeg through 9.0.2 contains an integer overflow vulnerability in dng_decode_tiles() that allows attackers to leak uninitialized memory via crafted DNG tile dimensions. Attackers can set TileWidth or TileLength near INT_MAX so the tile loop never runs, outputting a frame exposing uninitialized or stale heap memory.