CVE-2025-22042 ksmbd: add bounds check for create lease context
Missing bounds check in ksmbd allows attackers to cause denial of service or potentially escalate privileges via crafted SMB requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-22042?
CVE-2025-22042 is a high-severity missing authorization vulnerability in Debian Debian Linux, published on 16 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: add bounds check for create lease context
Add missing bounds check for create lease context.
Which versions are affected by CVE-2025-22042?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-22042?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-22042 being exploited?
There is no known exploitation of CVE-2025-22042 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-77564, BELL-CVE-2025-22042, DEBIAN-CVE-2025-22042, GHSA-9x7h-v87g-j6jw, ROOT-OS-UBUNTU-2204-CVE-2025-22042, ROOT-OS-UBUNTU-2404-CVE-2025-22042 and 1 more.