CVE-2026-21673
📋 TL;DR
This vulnerability involves integer overflow/underflow in the CIccXmlArrayType::ParseTextCountNum() function of iccDEV library, which could allow memory corruption when processing malicious ICC color profiles. It affects applications using iccDEV versions 2.3.1 and below for color management. Successful exploitation could lead to arbitrary code execution or application crashes.
💻 Affected Systems
- iccDEV library
- Applications using iccDEV for ICC color profile processing
📦 What is this software?
Iccdev by Color
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the application processing the ICC profile, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) when processing malformed ICC profiles, disrupting color management functionality.
If Mitigated
Limited impact with proper input validation and memory protections, potentially causing only application instability.
🎯 Exploit Status
Exploitation requires crafting a malicious ICC profile with specific XML content to trigger the overflow/underflow conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.1.1
Vendor Advisory: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-g66g-f82c-vgm6
Restart Required: Yes
Instructions:
1. Identify applications using iccDEV
2. Update iccDEV library to version 2.3.1.1 or later
3. Rebuild applications if statically linked
4. Restart affected applications/services
🔧 Temporary Workarounds
Input Validation
allImplement strict validation of ICC profile inputs before processing
Memory Protection
allEnable ASLR and DEP/Stack Canaries where supported
🧯 If You Can't Patch
- Restrict processing of ICC profiles to trusted sources only
- Implement application-level sandboxing for color profile processing
🔍 How to Verify
Check if Vulnerable:
Check if applications link to iccDEV library version 2.3.1 or earlier using ldd (Linux) or dependency walker toolsCheck Version:
Check library version in application dependencies or run: strings /path/to/libiccdev.so | grep 'iccDEV version'Verify Fix Applied:
Verify iccDEV version is 2.3.1.1 or later and test with known ICC profile processing📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing ICC profiles
- Memory access violation errors in application logs
Network Indicators:
- Unusual ICC profile uploads to applications
- Large or malformed ICC profile transfers
SIEM Query:
source="application_logs" AND ("segmentation fault" OR "access violation" OR "iccdev")