CVE-2026-89829 f2fs: fix to pass folio->index to f2fs_sanity_check_node_footer()
A logic error in the f2fs filesystem caused incorrect node ID validation, potentially leading to undefined behavior or stability issues.
- 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-2026-89829?
CVE-2026-89829 is a high-severity vulnerability in Linux, published on 16 Sep 2026. 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 pass folio->index to f2fs_sanity_check_node_footer()
Otherwise in f2fs_sanity_check_node_footer(), it will check the same nid incorrectly.
Which versions are affected by CVE-2026-89829?
How do I fix CVE-2026-89829?
Apply the vendor's patch.
Is CVE-2026-89829 being exploited?
There is no known exploitation of CVE-2026-89829 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-89829, DEBIAN-CVE-2026-89829, GHSA-4f5r-rjrj-j99g, UBUNTU-CVE-2026-89829.