CVE-2025-5683
📋 TL;DR
This vulnerability allows an attacker to cause a denial-of-service crash by loading a specially crafted ICNS image file in Qt's QImage component. It affects applications using Qt versions 6.3.0 through 6.5.9, 6.6.0 through 6.8.4, and 6.9.0. The vulnerability requires user interaction to load a malicious image file.
💻 Affected Systems
- Qt
- Applications using Qt's image processing capabilities
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial-of-service, potentially disrupting critical functionality in Qt-based applications.
Likely Case
Application instability or crash when processing malicious ICNS files, requiring restart of affected application.
If Mitigated
Minimal impact with proper input validation and sandboxing; application may log errors but remain functional.
🎯 Exploit Status
Exploitation requires user to load a malicious ICNS file. The fuzzing report suggests the crash is easily triggerable with crafted input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Qt 6.5.10, 6.8.5, and 6.9.1
Vendor Advisory: https://codereview.qt-project.org/c/qt/qtimageformats/+/644548
Restart Required: Yes
Instructions:
1. Identify Qt version in use. 2. Upgrade to patched version: 6.5.10, 6.8.5, or 6.9.1. 3. Recompile applications with updated Qt libraries. 4. Restart affected applications.
🔧 Temporary Workarounds
Disable ICNS file processing
allConfigure applications to reject or not process ICNS image files.
Application-specific configuration required
Input validation for image files
allImplement file type validation and sanitization before processing user-uploaded images.
Implement file signature checking for ICNS files
🧯 If You Can't Patch
- Implement strict file upload controls to block ICNS files
- Run Qt applications in sandboxed environments with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check Qt version with: qmake --version or examine linked Qt libraries in application.Check Version:
qmake --versionVerify Fix Applied:
Verify Qt version is 6.5.10, 6.8.5, or 6.9.1 or higher. Test with known malicious ICNS file to ensure no crash.📡 Detection & Monitoring
Log Indicators:
- Application crashes when loading image files
- Error logs mentioning QImage or ICNS processing failures
Network Indicators:
- Unusual ICNS file uploads to web applications
SIEM Query:
Application:Qt AND (EventID:1000 OR Error:*ICNS* OR Crash:*QImage*)