medium5.3
CVE-2025-54575
SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks
Impact
### 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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | SixLabors.ImageSharp | < 2.1.11 | 2.1.11 |
Affected products
| Product | Affected versions |
|---|---|
| Versions Below 2.1.11 And 3.0.0 | through 3.1.10 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f
- https://github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6
- https://github.com/SixLabors/ImageSharp/issues/2953
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc
- https://github.com/advisories/GHSA-rxmq-m78w-7wmc
- https://nvd.nist.gov/vuln/detail/CVE-2025-54575