Medium severity · published Jul 30, 2025
CVE-2025-54575
ImageSharp Triggers an Infinite Loop in its GIF Decoder When Skipping Malformed Comment Extension Blocks
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IM
ImageSharp · SixLabors
< 2.1.11; >= 3.0.0, < 3.1.11 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-54575
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-54575
github.com
https://github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f
github.com
https://github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6
github.com
https://github.com/SixLabors/ImageSharp/issues/2953
github.com
https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc
More from ImageSharp
7.5
CVE-2026-106118
ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes scanlines of ImageWidth — heap OOB write
7.5
CVE-2026-106117
ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp
7.5
CVE-2026-106115
ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
7.5
CVE-2026-106113
ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
7.5
CVE-2026-106112
ImageSharp: ICC LUT16 output channel count can write beyond Vector4