CVE-2026-25897
📋 TL;DR
An integer overflow vulnerability in ImageMagick's SUN decoder allows attackers to trigger an out-of-bounds heap write on 32-bit systems. This can potentially lead to remote code execution or denial of service when processing malicious images. Users running vulnerable ImageMagick versions on 32-bit architectures are affected.
💻 Affected Systems
- ImageMagick
📦 What is this software?
Imagemagick by Imagemagick
Imagemagick by Imagemagick
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the ImageMagick process, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) or limited memory corruption affecting system stability.
If Mitigated
No impact if proper input validation and sandboxing are implemented.
🎯 Exploit Status
Requires crafting a malicious SUN format image and triggering processing through ImageMagick.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.1.2-15 or 6.9.13-40
Vendor Advisory: https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-6j5f-24fw-pqp4
Restart Required: No
Instructions:
1. Update ImageMagick to version 7.1.2-15 or 6.9.13-40 using your package manager. 2. For source installations: download latest source from imagemagick.org, compile, and install.
🔧 Temporary Workarounds
Disable SUN decoder
linuxRemove or disable the SUN format decoder module to prevent processing of vulnerable image type.
mv /etc/ImageMagick-6/delegates.xml /etc/ImageMagick-6/delegates.xml.bak
Edit delegates.xml to remove SUN format entries
Input validation
allImplement strict file type validation to reject SUN format images before processing.
🧯 If You Can't Patch
- Restrict image processing to trusted sources only
- Implement application sandboxing with minimal privileges
🔍 How to Verify
Check if Vulnerable:
Check ImageMagick version and architecture: 'convert --version' and 'uname -m'Check Version:
convert --version | head -1Verify Fix Applied:
Confirm version is 7.1.2-15 or higher, or 6.9.13-40 or higher📡 Detection & Monitoring
Log Indicators:
- ImageMagick process crashes
- Memory corruption errors in system logs
- Failed image processing attempts
Network Indicators:
- Unexpected SUN format image uploads
- Bursts of image processing requests
SIEM Query:
source="*magick*" AND (error OR crash OR segmentation)