CVE-2026-72161

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: add journal NULL check in ocfs2_checkpoint_inode()

During unmount, ocfs2_journal_shutdown() frees the journal and sets

osb->journal to NULL. Later, when VFS evicts remaining cached inodes,

ocfs2_evict_inode() -> ocfs2_clear_inode() -> ocfs2_checkpoint_inode()

-> ocfs2_ci_fully_checkpointed() dereferences osb->journal, causing a

NULL pointer dereference.

Fix this by adding a NULL check for osb->journal in

ocfs2_checkpoint_inode(). If the journal is NULL, it has already been

fully flushed and destroyed during shutdown, so there is nothing to

checkpoint.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References