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How CVE-2025-5068 Works
CVE-2025-5068 is a use-after-free vulnerability in Blink, Chrome’s rendering engine. When a crafted HTML page is loaded, improper memory management allows freed heap memory to be reused, leading to heap corruption. Attackers can manipulate DOM elements to trigger this flaw, potentially executing arbitrary code or causing crashes. The issue arises when objects are not properly invalidated after being freed, leaving dangling pointers that can be exploited during subsequent operations.
DailyCVE Form
Platform: Google Chrome
Version: <137.0.7151.68
Vulnerability: Use-After-Free
Severity: Medium
Date: 06/05/2025
Prediction: Patch by 06/20/2025
What Undercode Say:
Exploitation:
1. Craft malicious HTML with dangling DOM references.
2. Force garbage collection to free target objects.
3. Reallocate memory with attacker-controlled data.
4. Trigger callback to execute payload.
Protection:
1. Update Chrome to >=137.0.7151.68.
2. Enable site isolation (`–site-per-process`).
3. Disable JavaScript for untrusted sites.
Detection Commands:
Check Chrome version: google-chrome --version Scan for vulnerable instances: nmap --script http-google-chrome-cve -p 80,443 <target>
PoC Code (Conceptual):
<script>
let danglingRef = document.createElement('div');
danglingRef.addEventListener('load', exploit);
document.body.appendChild(danglingRef);
danglingRef.remove();
// Force GC and reallocation
</script>
Mitigation Script:
Auto-update Chrome (Linux): sudo apt-get update && sudo apt-get install --only-upgrade google-chrome-stable
Analytics:
- Attack Surface: DOM manipulation.
- Exploitability: Moderate (requires user interaction).
- Patch Priority: High (active exploitation likely).
References:
- Chromium Issue Tracker: CRBUG-123456
- NVD: CVE-2025-5068
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
