CVE-2025-39842

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw within the ocfs2 subsystem. Specifically, a null-pointer dereference can occur during the journal shutdown process due to a race condition where osb->journal may be NULL before ocfs2 delete osb() is called. This occurs because ocfs2 journal shutdown() is executed prior to ocfs2 delete osb(), potentially leading to a failure when attempting to release the journal inode via jbd2 journal release jbd inode(). Adding checks for osb->journal prevents this null-pointer dereference.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.