CVE-2026-46061

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

Description A deadlock occurs in the jbd2 journal cancel revoke() function due to an incorrect lock ordering (folio -> buffer). This happens when the filesystem blocksize is smaller than the pagesize, leading to an ABBA deadlock between two threads. Specifically, one thread may hold a buffer lock while attempting to acquire a folio lock, while another thread holds a folio lock and attempts to acquire a buffer lock. This issue can cause system hangs.

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