CVE-2025-26651 Windows Local Session Manager (LSM) Denial of Service Vulnerability
An authorized attacker can cause a denial of service in Windows Local Session Manager via an exposed dangerous method.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-26651?
CVE-2025-26651 is a medium-severity denial of service vulnerability in Microsoft Windows 11 22h2, published on 8 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Exposed dangerous method or function in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
Weakness: CWE-749
Which versions are affected by CVE-2025-26651?
It affects 6 products.
Products include Microsoft Windows 11 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-26651?
No fix has been published for CVE-2025-26651 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-26651 being exploited?
There is no known exploitation of CVE-2025-26651 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 22h2
- CVE-2024-49117 Windows Hyper-V Remote Code Execution Vulnerability
- CVE-2024-21435 Windows OLE Remote Code Execution Vulnerability
- CVE-2025-24084 Windows Subsystem for Linux (WSL2) Kernel Remote Code Execution Vulnerability
- CVE-2025-33054 Remote Desktop Spoofing Vulnerability
- CVE-2025-29828 Windows Schannel Remote Code Execution Vulnerability
Sources
Also known as GHSA-47qr-4ffm-5qm9.