CVE-2022-50622 ext4: fix potential memory leak in ext4_fc_record_modified_inode()
A memory leak in the Linux kernel ext4 filesystem can lead to resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50622?
CVE-2022-50622 is a memory corruption vulnerability in Linux, published on 8 Dec 2025. 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:
ext4: fix potential memory leak in ext4_fc_record_modified_inode()
As krealloc may return NULL, in this case 'state->fc_modified_inodes' may not be freed by krealloc, but 'state->fc_modified_inodes' already set NULL. Then will lead to 'state->fc_modified_inodes' memory leak.
Which versions are affected by CVE-2022-50622?
How do I fix CVE-2022-50622?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-50622 being exploited?
There is no known exploitation of CVE-2022-50622 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50622, GHSA-hfg2-96v6-99jv, UBUNTU-CVE-2022-50622.