CVE-2025-14860
📋 TL;DR
A use-after-free vulnerability in Firefox's Disability Access APIs allows attackers to execute arbitrary code by manipulating freed memory. This affects all Firefox users running versions below 146.0.1, potentially leading to complete system compromise.
💻 Affected Systems
- Mozilla Firefox
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, and persistent backdoor installation.
Likely Case
Browser crash leading to denial of service, with potential for limited code execution in sandboxed context.
If Mitigated
Browser crash without code execution if sandboxing holds, but potential for memory corruption still exists.
🎯 Exploit Status
Use-after-free vulnerabilities typically require specific memory manipulation techniques but can be reliably exploited with sufficient research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 146.0.1
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2025-98/
Restart Required: Yes
Instructions:
1. Open Firefox. 2. Click menu → Help → About Firefox. 3. Firefox will automatically check for and install updates. 4. Restart Firefox when prompted.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents exploitation by disabling JavaScript execution, which is typically required for this type of vulnerability.
about:config → javascript.enabled = false
Use Enhanced Tracking Protection Strict
allBlocks more trackers and potentially malicious scripts.
Settings → Privacy & Security → Enhanced Tracking Protection → Strict
🧯 If You Can't Patch
- Restrict Firefox to trusted websites only using network policies
- Deploy application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check Firefox version in About Firefox (menu → Help → About Firefox). If version is less than 146.0.1, system is vulnerable.Check Version:
firefox --version (Linux/macOS) or check About Firefox on WindowsVerify Fix Applied:
Confirm Firefox version is 146.0.1 or higher in About Firefox dialog.📡 Detection & Monitoring
Log Indicators:
- Firefox crash reports with memory access violations
- Unexpected Firefox process termination
- Access violations in system logs
Network Indicators:
- Unusual outbound connections from Firefox process
- Traffic to known malicious domains
SIEM Query:
process_name:"firefox.exe" AND (event_id:1000 OR event_id:1001) OR process_crash:true