CVE-2025-54575

ImageSharp Triggers an Infinite Loop in its GIF Decoder When Skipping Malformed Comment Extension Blocks

Description

ImageSharp is a 2D graphics library. In versions below 2.1.11 and 3.0.0 through 3.1.10, 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. This issue is fixed in versions 2.1.11 and 3.1.11.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: SixLabors ImageSharp
Published at:
Updated at:

References

Link Tags
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

Frequently Asked Questions

What is the severity of CVE-2025-54575?
CVE-2025-54575 has been scored as a medium severity vulnerability.
How to fix CVE-2025-54575?
To fix CVE-2025-54575, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54575 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-54575 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54575?
CVE-2025-54575 affects SixLabors ImageSharp.
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