CVE-2024-27034 f2fs: compress: fix to cover normal cluster write with cp_rwsem
A race condition in the Linux kernel f2fs filesystem allows data corruption when overwriting compressed clusters, 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-2024-27034?
CVE-2024-27034 is a high-severity vulnerability in Linux kernel, published on 1 May 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:
f2fs: compress: fix to cover normal cluster write with cp_rwsem
When we overwrite compressed cluster w/ normal cluster, we should not unlock cp_rwsem during f2fs_write_raw_pages(), otherwise data will be corrupted if partial blocks were persisted before CP & SPOR, due to cluster metadata wasn't updated atomically.
Which versions are affected by CVE-2024-27034?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-27034?
Apply the vendor's patch.
Is CVE-2024-27034 being exploited?
There is no known exploitation of CVE-2024-27034 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-27034, DEBIAN-CVE-2024-27034, GHSA-292c-cv4c-47f7, ROOT-OS-DEBIAN-11-CVE-2024-27034, UBUNTU-CVE-2024-27034.