CVE-2025-47978 Windows Kerberos Denial of Service Vulnerability
An authorized attacker can cause a denial of service in Windows Kerberos via an out-of-bounds read.
- 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-2025-47978?
CVE-2025-47978 is a medium-severity denial of service vulnerability in Microsoft Windows Server 2022, published on 8 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.
Weakness: CWE-125
Which versions are affected by CVE-2025-47978?
It affects 3 products.
Products include Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-47978?
No fix has been published for CVE-2025-47978 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-2025-47978 being exploited?
There is no known exploitation of CVE-2025-47978 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2022
- CVE-2022-34715 Windows Network File System Remote Code Execution Vulnerability
- CVE-2025-50171 Remote Desktop Spoofing Vulnerability
- CVE-2026-70167 Windows Domain Name Service Remote Code Execution Vulnerability
- CVE-2026-45648 Windows Active Directory Domain Services Remote Code Execution Vulnerability
- CVE-2024-30064 Windows Kernel Elevation of Privilege Vulnerability
Sources
Also known as GHSA-wppg-5754-pf4w.