CVE-2024-42307 cifs: fix potential null pointer use in destroy_workqueue in init_cifs error path
A null pointer dereference in the Linux kernel CIFS module error path can cause a system crash, requiring a kernel patch.
- 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-2024-42307?
CVE-2024-42307 is a medium-severity vulnerability in Linux kernel, published on 17 Aug 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:
cifs: fix potential null pointer use in destroy_workqueue in init_cifs error path
Dan Carpenter reported a Smack static checker warning: fs/smb/client/cifsfs.c:1981 init_cifs() error: we previously assumed 'serverclose_wq' could be null (see line 1895)
The patch which introduced the serverclose workqueue used the wrong oredering in error paths in init_cifs() for freeing it on errors.
Weakness: CWE-476
Which versions are affected by CVE-2024-42307?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42307?
Apply the vendor's patch.
Is CVE-2024-42307 being exploited?
There is no known exploitation of CVE-2024-42307 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-42307, DEBIAN-CVE-2024-42307, GHSA-3h49-76hw-pv6f, UBUNTU-CVE-2024-42307.