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CVE-2025-54575— ImageSharp Triggers an Infinite Loop in its GIF Decoder When Skipping Malformed Comment Extension Blocks

Quick assessment

Affected
SixLabors ImageSharp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageSharp是Six Labors开源的一款全新的、功能齐全、管理全面、跨平台的二维图形 API。 ImageSharp 2.1.11之前版本和3.0.0至3.1.10版本存在安全漏洞，该漏洞源于处理特制GIF文件时可能进入无限循环，导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.45% · P39

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-54575

Vulnerability Information
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Vulnerability Title
ImageSharp Triggers an Infinite Loop in its GIF Decoder When Skipping Malformed Comment Extension Blocks
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
ImageSharp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ImageSharp是Six Labors开源的一款全新的、功能齐全、管理全面、跨平台的二维图形 API。 ImageSharp 2.1.11之前版本和3.0.0至3.1.10版本存在安全漏洞，该漏洞源于处理特制GIF文件时可能进入无限循环，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SixLabors ImageSharp < 2.1.11 -

II. Public POCs for CVE-2025-54575

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III. Intelligence Information for CVE-2025-54575

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IV. Related Vulnerabilities

Same product: ImageSharp
Same vendor: SixLabors
Same weakness: CWE-400