CVE-2025-48808
📋 TL;DR
This Windows Kernel vulnerability allows an authenticated attacker with local access to a system to read sensitive information they shouldn't have access to. It affects Windows systems where an authorized user could exploit kernel memory disclosure. This is an information disclosure issue that could help attackers gather intelligence for further attacks.
💻 Affected Systems
- Windows
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read kernel memory containing passwords, encryption keys, or other sensitive data, potentially enabling privilege escalation or lateral movement.
Likely Case
Local authenticated users could read kernel memory structures, potentially exposing system information or user data that could aid in further attacks.
If Mitigated
With proper access controls and monitoring, the impact is limited to information disclosure without direct system compromise.
🎯 Exploit Status
Requires local authenticated access and kernel-level exploitation knowledge. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Will be specified in Microsoft's monthly security updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48808
Restart Required: Yes
Instructions:
1. Check Microsoft's security update guide for CVE-2025-48808. 2. Apply the appropriate Windows security update through Windows Update. 3. Restart the system as required.
🔧 Temporary Workarounds
Restrict Local Access
windowsLimit local user access to systems where this vulnerability could be exploited
Implement Least Privilege
windowsEnsure users only have necessary permissions and cannot run arbitrary code locally
🧯 If You Can't Patch
- Implement strict access controls to limit which users can log in locally
- Monitor for unusual local user activity and kernel access attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows version and compare with Microsoft's security bulletin for affected versionsCheck Version:
wmic os get caption, version, buildnumberVerify Fix Applied:
Verify Windows Update history shows the security update for CVE-2025-48808 has been applied📡 Detection & Monitoring
Log Indicators:
- Unusual kernel object access attempts
- Suspicious local user activity patterns
- Failed or successful attempts to access protected kernel memory
Network Indicators:
- Not applicable - this is a local vulnerability
SIEM Query:
EventID=4688 AND ProcessName contains suspicious kernel access patterns OR EventID=4656 with kernel object access attempts