CVE-2022-50046 net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change()
A missing null check in the Linux kernel's sunrpc module can cause a null pointer dereference, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50046?
CVE-2022-50046 is a medium-severity vulnerability in Linux kernel, published on 18 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change()
The issue happens on some error handling paths. When the function fails to grab the object `xprt`, it simply returns 0, forgetting to decrease the reference count of another object `xps`, which is increased by rpc_sysfs_xprt_kobj_get_xprt_switch(), causing refcount leaks. Also, the function forgets to check whether `xps` is valid before using it, which may result in NULL-dereferencing issues.
Fix it by adding proper error handling code when either `xprt` or `xps` is NULL.
Weakness: CWE-401
Which versions are affected by CVE-2022-50046?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-50046?
Apply the vendor's patch.
Is CVE-2022-50046 being exploited?
There is no known exploitation of CVE-2022-50046 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-50046, GHSA-jfxc-phgj-xgp4, UBUNTU-CVE-2022-50046.