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How the CVE Works
CVE-2025-49664 is an information disclosure vulnerability in the Windows User-Mode Driver Framework (UMDF) Host. The flaw occurs due to improper handling of memory buffers, allowing a local attacker with valid credentials to read sensitive kernel data. When a vulnerable driver processes certain IOCTL requests, it fails to properly sanitize memory addresses, leading to unintended exposure of privileged information. Attackers can exploit this by crafting malicious driver requests, triggering the leak of kernel pointers or other critical data, which could aid further exploitation.
DailyCVE Form
Platform: Windows UMDF Host
Version: Pre-patch builds
Vulnerability: Information Disclosure
Severity: Medium
Date: 07/15/2025
Prediction: Patch expected by 08/10/2025
What Undercode Say
Analytics:
windbg !analyze -v umdfhost.sys !poolview <leaked_address> dt nt!_KAPC_STATE
How Exploit
1. Attacker gains local access.
2. Crafts malicious IOCTL request.
3. Triggers memory leak via UMDF Host.
Protection from this CVE
- Apply Microsoft patch (TBD).
- Restrict driver loading.
- Enable UMDF isolation.
Impact
- Kernel pointer leaks.
- Potential privilege escalation.
- System integrity compromise.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
