CVE-2024-43642 Windows SMB Denial of Service Vulnerability
A use-after-free flaw in Windows SMB allows attackers to cause a denial of service, requiring patches for Windows 11 and Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-43642?
CVE-2024-43642 is a high-severity use after free vulnerability in Microsoft Windows 11 22h2, published on 12 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Windows SMB Denial of Service Vulnerability
Weakness: CWE-416
Which versions are affected by CVE-2024-43642?
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-2024-43642?
No fix has been published for CVE-2024-43642 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-43642 being exploited?
There is no known exploitation of CVE-2024-43642 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-x3c4-52mm-7pp9.