Bug 2571179 (CVE-2026-125267)

Summary: CVE-2026-125267 ffmpeg: FFmpeg: arbitrary code execution via crafted APAC file
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
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 into opening a specially crafted APAC audio file. Due to an integer overflow in the APAC decoder, the application fails to properly manage memory reallocation checks, resulting in a heap out-of-bounds write. Successful exploitation could allow arbitrary code execution with the privileges of the running application or crash the program, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 20:44:19 UTC 
FFmpeg before 8.1.3 and 9.x before 9.0.2 contains a heap out-of-bounds write vulnerability in the APAC decoder in libavcodec/apac.c caused by an unreset bitstream index. Attackers can supply a crafted APAC file whose growing bitstream_index triggers an integer overflow, bypassing the reallocation check so memcpy() corrupts heap memory or crashes the application.