CVE-2024-56637 netfilter: ipset: Hold module reference while requesting a module
A race condition in the Linux kernel ipset module allows unprivileged users to trigger a kernel crash by unloading the module during a backend request.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-56637?
CVE-2024-56637 is a high-severity vulnerability in Linux kernel, published on 27 Dec 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Hold module reference while requesting a module
User space may unload ip_set.ko while it is itself requesting a set type backend module, leading to a kernel crash. The race condition may be provoked by inserting an mdelay() right after the nfnl_unlock() call.
Weakness: CWE-362
Which versions are affected by CVE-2024-56637?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-56637?
Apply the vendor's patch.
Is CVE-2024-56637 being exploited?
There is no known exploitation of CVE-2024-56637 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-56637, DEBIAN-CVE-2024-56637, GHSA-cw79-fj97-mpr9, UBUNTU-CVE-2024-56637.