sixlabors/imagesharp · Security
SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks
- GHSA ID
- GHSA-rxmq-m78w-7wmc
- CVE ID
- CVE-2025-54575
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc ↗
- https://github.com/SixLabors/ImageSharp/issues/2953 ↗
- https://github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f ↗
- https://github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-54575 ↗
- https://github.com/advisories/GHSA-rxmq-m78w-7wmc ↗