CVE-2024-47737 nfsd: call cache_put if xdr_reserve_space returns NULL
A missing cache_put call in the Linux kernel NFS server can lead to a null pointer dereference and denial of service when buffer space is exhausted.
- 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-2024-47737?
CVE-2024-47737 is a medium-severity vulnerability in Linux kernel, published on 21 Oct 2024. 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:
nfsd: call cache_put if xdr_reserve_space returns NULL
If not enough buffer space available, but idmap_lookup has triggered lookup_fn which calls cache_get and returns successfully. Then we missed to call cache_put here which pairs with cache_get.
Reviwed-by: Jeff Layton <[email protected]>
Weakness: CWE-476
Which versions are affected by CVE-2024-47737?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-47737?
Apply the vendor's patch.
Is CVE-2024-47737 being exploited?
There is no known exploitation of CVE-2024-47737 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-50785, AZL-50945, BELL-CVE-2024-47737, DEBIAN-CVE-2024-47737, GHSA-6hr8-8x9g-vvm6, UBUNTU-CVE-2024-47737.