MEDIUM5.3
GHSA-rxmq-m78w-7wmc
SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks
Quick fix
GHSA-rxmq-m78w-7wmc — SixLabors.ImageSharp: upgrade to the fixed version with the command below.
dotnet add package SixLabors.ImageSharp --version 2.1.11Details
### 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.
Are you affected?
Enter the version of the package you're using.
Affected packages
NuGet/SixLabors.ImageSharp
Introduced in:
0Fixed in: 2.1.11Fix
dotnet add package SixLabors.ImageSharp --version 2.1.11NuGet/SixLabors.ImageSharp
Introduced in:
3.0.0Fixed in: 3.1.11Fix
dotnet add package SixLabors.ImageSharp --version 3.1.11References
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-54575[ADVISORY]
- https://github.com/SixLabors/ImageSharp/issues/2953[WEB]
- https://github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f[WEB]
- https://github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6[WEB]
- https://github.com/SixLabors/ImageSharp[PACKAGE]