Bug 2569841 (CVE-2026-125210)

Summary: CVE-2026-125210 ffmpeg: ffmpeg: Heap buffer overflow via crafted ARIB caption stream
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 tricking a user or automated system into processing a specially crafted Association of Radio Industries and Businesses (ARIB) caption stream containing zero regions. This triggers a heap-based buffer overflow during text subtitle decoding, corrupting heap memory. Successful exploitation can result in a denial of service (DoS) or potentially arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:18:21 UTC
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in aribcaption_trans_text_subtitle() in libavcodec/libaribcaption.c when decoding with sub_type text. Attackers can supply a crafted ARIB STD-B24 caption stream with zero regions, causing a pointer write past a zero-sized sub->rects allocation and corrupting heap memory.