CVE-2025-54575: SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks
(updated )
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.
References
- github.com/SixLabors/ImageSharp
- github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f
- github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6
- github.com/SixLabors/ImageSharp/issues/2953
- github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc
- github.com/advisories/GHSA-rxmq-m78w-7wmc
- nvd.nist.gov/vuln/detail/CVE-2025-54575
Code Behaviors & Features
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