CVE-2022-50729 ksmbd: Fix resource leak in ksmbd_session_rpc_open()

Not scored Published 24 Dec 2025 Updated 11 May 2026

A resource leak in the Linux kernel ksmbd module allows authenticated attackers to cause a denial of service by triggering RPC open failures.

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-2022-50729?

CVE-2022-50729 is a denial of service vulnerability in Linux, published on 24 Dec 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: Fix resource leak in ksmbd_session_rpc_open()

When ksmbd_rpc_open() fails then it must call ksmbd_rpc_id_free() to undo the result of ksmbd_ipc_id_alloc().

Which versions are affected by CVE-2022-50729?

How do I fix CVE-2022-50729?

Apply the vendor's patch.

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-2022-50729 being exploited?

There is no known exploitation of CVE-2022-50729 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-50729, GHSA-xrp3-5xgj-7xgw, UBUNTU-CVE-2022-50729.