CVE-2021-44879 Null dereference in n/a
A NULL pointer dereference in the Linux kernel F2FS garbage collection allows local attackers to cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-44879?
CVE-2021-44879 is a medium-severity vulnerability in Linux kernel, published on 13 Feb 2022. 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 gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL pointer dereference.
Weakness: CWE-476
Which versions are affected by CVE-2021-44879?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-44879?
Apply the vendor's patch.
Is CVE-2021-44879 being exploited?
There is no known exploitation of CVE-2021-44879 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-8577, CLSA-2022-1667414297, CLSA-2022-1667416255, DEBIAN-CVE-2021-44879, GHSA-6vpr-3pgw-5q44, OESA-2022-1574 and 1 more.