CVE-2026-21686
📋 TL;DR
This vulnerability involves undefined behavior in the CIccTagLutAtoB::Validate() function of the iccDEV library, which could lead to crashes, memory corruption, or potential code execution when processing malicious ICC color profiles. It affects all users of iccDEV library versions prior to 2.3.1.2 who process ICC color profiles from untrusted sources.
💻 Affected Systems
- iccDEV library
📦 What is this software?
Iccdev by Color
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if an attacker can supply malicious ICC profiles and trigger the undefined behavior in a way that allows arbitrary code execution.
Likely Case
Application crashes, denial of service, or memory corruption leading to instability when processing malformed ICC profiles.
If Mitigated
Limited impact if proper input validation and sandboxing are in place, potentially just crashes in isolated processes.
🎯 Exploit Status
Exploitation requires crafting malicious ICC profiles and triggering the vulnerable validation function. No public exploit code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.1.2
Vendor Advisory: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-792q-cqq9-mq4x
Restart Required: Yes
Instructions:
1. Update iccDEV library to version 2.3.1.2 or later. 2. Recompile any applications using the library. 3. Restart affected services or applications.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict validation of ICC profiles before passing to iccDEV library functions
🧯 If You Can't Patch
- Restrict processing of ICC profiles to trusted sources only
- Isolate ICC profile processing in sandboxed environments or containers
🔍 How to Verify
Check if Vulnerable:
Check if your application uses iccDEV library version < 2.3.1.2. Review dependencies and linked libraries.Check Version:
Check library version in build configuration or use: pkg-config --modversion iccdev (if available)Verify Fix Applied:
Verify iccDEV library version is 2.3.1.2 or higher. Test with known ICC profiles to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing ICC profiles
- Memory access violation errors in logs
- Unexpected termination of ICC profile processing services
Network Indicators:
- Unusual uploads of ICC profile files to web applications
- Multiple failed ICC processing attempts
SIEM Query:
source="application_logs" AND ("segmentation fault" OR "access violation" OR "undefined behavior") AND "icc"