CVE-2023-52682 f2fs: fix to wait on block writeback for post_read case
A race condition in the f2fs filesystem allows out-of-order garbage collection to overwrite new data with old data, requiring compressed but unencrypted inodes.
- 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-2023-52682?
CVE-2023-52682 is a high-severity vulnerability in Linux kernel, published on 17 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: fix to wait on block writeback for post_read case
If inode is compressed, but not encrypted, it missed to call f2fs_wait_on_block_writeback() to wait for GCed page writeback in IPU write path.
Thread A GC-Thread - f2fs_gc - do_garbage_collect - gc_data_segment - move_data_block - f2fs_submit_page_write migrate normal cluster's block via meta_inode's page cache - f2fs_write_single_data_page - f2fs_do_write_data_page - f2fs_inplace_write_data - f2fs_submit_page_bio
IRQ - f2fs_read_end_io IRQ old data overrides new data due to out-of-order GC and common IO. - f2fs_read_end_io
Weakness: CWE-125
Which versions are affected by CVE-2023-52682?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52682?
Apply the vendor's patch.
Is CVE-2023-52682 being exploited?
There is no known exploitation of CVE-2023-52682 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52682, DEBIAN-CVE-2023-52682, GHSA-gh7x-5rqw-m74q, ROOT-OS-DEBIAN-11-CVE-2023-52682, ROOT-OS-UBUNTU-2204-CVE-2023-52682, UBUNTU-CVE-2023-52682.