CVE-2026-125267
Published:November 09, 2026
Updated:November 10, 2026
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.
Affected Packages
ffmpeg (CONAN):
Affected version(s) =9.0.1 <9.0.2 || >=8.0 <9.0.2 || >=7.0.1 <9.0.2 || >=6.0 <9.0.2Fix Suggestion:
Update to version 9.0.2https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n6.0 <n8.1.3 || >=n7.0 <n8.1.3 || >=n8.0 <n8.1.3Fix Suggestion:
Update to version n8.1.3https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) =n8.2-dev <n9.0.2 || >=n9.0 <n9.0.2Fix Suggestion:
Update to version n9.0.2Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound