Bug 2570041 (CVE-2026-125227)

Summary: CVE-2026-125227 ffmpeg: FFmpeg: Heap buffer overflow via integer overflow in JPEG bitstream parsing
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 to cause memory corruption or a Denial of Service (DoS), and potentially achieve arbitrary code execution, by supplying a specially crafted JPEG or MJPEG (Motion JPEG) media stream. This issue stems from an integer overflow in the JPEG bitstream parsing logic on 32-bit systems, which triggers a heap-based buffer overflow when processing oversized image scans.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:32:34 UTC 
FFmpeg through 9.0.2 contains an integer overflow in cbs_jpeg_write_scan() in libavcodec/cbs_jpeg.c that causes a heap buffer overflow on 32-bit builds. Attackers can supply a crafted MJPEG/JPEG stream with a scan of 512 MiB or more, processed by CBS bitstream filters like filter_units, to corrupt the heap or crash the application.