CVE-2026-93258 ocfs2: do not use make_bad_inode() in ocfs2_read_inode_block_full()
A flaw in the Linux kernel OCFS2 filesystem can cause a system crash during directory lookups due to incorrect inode handling.
- 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-2026-93258?
CVE-2026-93258 is a denial of service vulnerability in Linux, published on 24 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:
ocfs2: do not use make_bad_inode() in ocfs2_read_inode_block_full()
This reverts commit 58b6fcd2ab34 ("ocfs2: mark inode bad upon validation failure during read").
Since 'make_bad_inode()' resets inode type to S_IFREG, doing this for directory inode during active VFS lookup is likely to confuse the latter, including VFS_BUG_ON_INODE() triggered in this case.
Which versions are affected by CVE-2026-93258?
How do I fix CVE-2026-93258?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-93258 being exploited?
There is no known exploitation of CVE-2026-93258 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-93258, GHSA-xg3j-cr9w-jr78, UBUNTU-CVE-2026-93258.