CVE-2025-15535
📋 TL;DR
A null pointer dereference vulnerability in nicbarker clay library versions up to 0.14 allows local attackers to cause denial of service through the Clay__MeasureTextCached function. This affects any software using the vulnerable clay.h library. The exploit requires local access to the system.
💻 Affected Systems
- nicbarker clay library
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service for the affected software component
Likely Case
Local denial of service causing application instability or termination
If Mitigated
Minimal impact with proper privilege separation and sandboxing
🎯 Exploit Status
Exploit code is publicly available on GitHub, requires local access to execute
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor the GitHub repository for updates: https://github.com/nicbarker/clay
🔧 Temporary Workarounds
Remove or disable clay library
allUninstall or disable the vulnerable clay library from affected systems
Check package manager for removal commands specific to your distribution
Sandbox applications using clay
linuxRun applications that use the clay library in restricted environments
Use containerization (Docker) with limited privileges
Implement SELinux/AppArmor policies
🧯 If You Can't Patch
- Implement strict local access controls to limit who can execute code on affected systems
- Monitor system logs for application crashes related to clay library usage
🔍 How to Verify
Check if Vulnerable:
Check if clay library version 0.14 or earlier is installed: 'find / -name "*clay*" -type f 2>/dev/null' and examine version informationCheck Version:
Check library files or package manager for clay version (e.g., 'dpkg -l | grep clay' on Debian-based systems)Verify Fix Applied:
Verify clay library is removed or updated to version above 0.14 when available📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Null pointer exception logs from applications using clay
Network Indicators:
- No network indicators - local exploit only
SIEM Query:
Search for process termination events with exit code 139 (SIGSEGV) from applications known to use clay library