Out-of-bounds Write Affecting ffmpeg-8.1-libswscale9 package, versions <8.1.3-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.49% (40th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-FFMPEG81LIBSWSCALE9-20030164
  • published22 Sept 2026
  • disclosed24 Jul 2026

Introduced: 24 Jul 2026

CVE-2026-66041  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Minimos:latest ffmpeg-8.1-libswscale9 to version 8.1.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg-8.1-libswscale9 package and not the ffmpeg-8.1-libswscale9 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.

CVSS Base Scores

version 3.1