CVE-2026-46052

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

Description An issue exists in the Ceph component of the Linux kernel where d add() can be called on a negative dentry that is already present in the primary dcache hash. This occurs because certain paths in fs/ceph/dir.c, specifically within the ceph finish lookup() and ceph lookup() functions, incorrectly assume that a negative dentry is also unhashed. When an already hashed dentry is reinserted via d rehash(), it can corrupt the hash bucket and create a self-loop. This corruption may cause d lookup() to enter an infinite loop during the hlist bl walk, leading to RCU stall reports.

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