FFmpeg through 9.0.2 Integer Overflow in OpenEXR Decoder Tile Count

Advisories

FFmpeg through 9.0.2 Integer Overflow in OpenEXR Decoder Tile Count

Severity: medium
Date: 11/9/2026
Affecting: FFmpeg <= 9.0.2
CVE: CVE-2026-125100
CWE: CWE-190 Integer Overflow or Wraparound
CVSS: 4.8
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25715
Patch Commit
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/exr.c#L2219
https://github.com/FFmpeg/FFmpeg
Credit: Joshua Rogers (AISLE Research), Michael Niedermayer
Description: FFmpeg through 9.0.2 contains an integer overflow vulnerability in the OpenEXR decoder's decode_frame() in libavcodec/exr.c that miscalculates the tiled block count. Attackers can supply a crafted tiled OpenEXR image with large dimensions and small tiles to skip decoding and disclose uninitialized memory or stale frame data.

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