CVE-2024-46844 um: line: always fill *error_out in setup_one_line()
A missing initialization in the Linux kernel UML line driver can lead to a null pointer dereference, causing 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-2024-46844?
CVE-2024-46844 is a high-severity vulnerability in Linux kernel, published on 27 Sep 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:
um: line: always fill *error_out in setup_one_line()
The pointer isn't initialized by callers, but I have encountered cases where it's still printed; initialize it in all possible cases in setup_one_line().
Weakness: CWE-824
Which versions are affected by CVE-2024-46844?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46844?
Apply the vendor's patch.
Is CVE-2024-46844 being exploited?
There is no known exploitation of CVE-2024-46844 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-49797, BELL-CVE-2024-46844, DEBIAN-CVE-2024-46844, GHSA-xv9p-58xx-4r8r, UBUNTU-CVE-2024-46844.