CVE-2026-22891
📋 TL;DR
A heap-based buffer overflow vulnerability in libbiosig's Intan CLP parsing allows arbitrary code execution when processing malicious files. This affects systems using libbiosig 3.9.2 or the master branch for biomedical signal processing. Attackers can achieve remote code execution by tricking users or automated systems into opening specially crafted files.
💻 Affected Systems
- The Biosig Project libbiosig
📦 What is this software?
Libbiosig by Libbiosig Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the affected system, potentially leading to data theft, ransomware deployment, or lateral movement within networks.
Likely Case
Remote code execution with the privileges of the user or service parsing the Intan CLP file, enabling data exfiltration, installation of malware, or system disruption.
If Mitigated
Denial of service through application crash if memory protections prevent code execution, but system integrity remains compromised.
🎯 Exploit Status
Exploitation requires the victim to process a malicious Intan CLP file, which could be delivered via email, downloads, or automated systems. No authentication is needed to trigger the vulnerability once the file is parsed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet released
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2026-2361
Restart Required: No
Instructions:
1. Monitor The Biosig Project website or GitHub repository for security updates. 2. Apply the patch once available. 3. Recompile or update any applications using libbiosig.
🔧 Temporary Workarounds
Disable Intan CLP file processing
allTemporarily disable or block parsing of Intan CLP files in applications using libbiosig to prevent exploitation.
# Configuration depends on specific application; check documentation for file type handling settings.
Input validation and sanitization
allImplement strict validation of Intan CLP files before processing, rejecting suspicious or malformed files.
# Add file validation logic in application code; example pseudocode: if (!validate_clp_file(file)) { reject_file(); }
🧯 If You Can't Patch
- Isolate systems using libbiosig from critical networks and the internet to limit attack surface.
- Implement application whitelisting to prevent unauthorized execution of code from buffer overflow exploits.
🔍 How to Verify
Check if Vulnerable:
Check the libbiosig version: on Linux, run 'biosig-fmt --version' or inspect source code for version 3.9.2 or commit db9a9a63.Check Version:
biosig-fmt --version 2>&1 | grep -i versionVerify Fix Applied:
After patching, verify the version is updated beyond 3.9.2 or the vulnerable commit, and test with safe Intan CLP files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes or segmentation faults when processing Intan CLP files
- Unusual process spawns or network connections from libbiosig-related applications
Network Indicators:
- Unexpected file transfers of Intan CLP files to vulnerable systems
- Anomalous outbound connections from systems running libbiosig
SIEM Query:
source="application_logs" AND (event="segmentation fault" OR event="buffer overflow") AND process="*biosig*"