GHSA-rxmq-m78w-7wmcMediumCVSS 5.3

SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

Published
July 30, 2025
Last Modified
July 31, 2025

🔗 CVE IDs covered (1)

CVE-2025-54575 →

📋 Description

Impact

A specially crafted GIF file containing a malformed comment extension block (with a missing block terminator) can cause the ImageSharp GIF decoder to enter an infinite loop while attempting to skip the block. This leads to a denial of service. Applications processing untrusted GIF input should upgrade to a patched version.

Patches

The problem has been patched. All users are advised to upgrade to v3.1.11 or v2.1.11.

Workarounds

None.

🎯 Affected products2

  • nuget/SixLabors.ImageSharp:< 2.1.11
  • nuget/SixLabors.ImageSharp:>= 3.0.0, < 3.1.11

🔗 References (6)