CVE-2026-80527

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

Description A reader can experience an indefinite hang in the ceph get caps() function when the client no longer holds FILE RD but the local capability state incorrectly indicates that the capability is already wanted via mds wanted. This occurs because cap->mds wanted is updated before the CEPH MSG CLIENT CAPS message is queued for sending, creating a discrepancy between what the client wants and what the Metadata Server (MDS) knows. If a capability update fails to reach the MDS after cap->mds wanted is raised, the try get cap refs() function returns 0, causing the process to wait on i cap wq indefinitely unless unrelated traffic triggers a wake-up.

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