Bug 2569956 (CVE-2026-125264)

Summary: CVE-2026-125264 ffmpeg: ffmpeg: Denial of Service via crafted JPEG XL frame header
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
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 attacker could exploit this vulnerability by providing a specially crafted JPEG XL image file containing an excessively large Table of Contents (TOC) entry count. Because the parser fails to properly validate this value against the remaining input data, processing the file triggers an excessive processing loop, leading to high CPU resource consumption and a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-10 19:27:00 UTC 
FFmpeg through 9.0.2 contains an uncontrolled resource consumption vulnerability in parse_frame_header() in libavcodec/jpegxl_parser.c that fails to validate TOC entry counts against remaining input. Attackers can supply a crafted JPEG XL frame header with a permuted TOC and huge toc_count, making the parser loop excessively and exhaust CPU.