CVE-2024-26869 f2fs: fix to truncate meta inode pages forcely
A race condition in the Linux kernel f2fs filesystem can lead to data corruption during garbage collection operations.
- 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-2024-26869?
CVE-2024-26869 is a high-severity vulnerability in Linux kernel, published on 17 Apr 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: fix to truncate meta inode pages forcely
Below race case can cause data corruption:
Thread A GC thread - gc_data_segment - ra_data_block - locked meta_inode page - f2fs_inplace_write_data - invalidate_mapping_pages : fail to invalidate meta_inode page due to lock failure or dirty|writeback status - f2fs_submit_page_bio : write last dirty data to old blkaddr - move_data_block - load old data from meta_inode page - f2fs_submit_page_write : write old data to new blkaddr
Because invalidate_mapping_pages() will skip invalidating page which has unclear status including locked, dirty, writeback and so on, so we need to use truncate_inode_pages_range() instead of invalidate_mapping_pages() to make sure meta_inode page will be dropped.
Weakness: CWE-362
Which versions are affected by CVE-2024-26869?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-26869?
Apply the vendor's patch.
Is CVE-2024-26869 being exploited?
There is no known exploitation of CVE-2024-26869 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-61721, BELL-CVE-2024-26869, DEBIAN-CVE-2024-26869, GHSA-48pj-w278-q66r, ROOT-OS-DEBIAN-11-CVE-2024-26869, ROOT-OS-DEBIAN-12-CVE-2024-26869 and 2 more.