CVE-2026-89692

A flaw was found in the Linux kernel's Network File System NFS daemon, nfsd. This vulnerability occurs when a delegation recall operation fails, leaving a critical internal flag uncleared. This prevents subsequent attempts to break the same delegation, leading to a denial of service where file...

PT-2026-90408

In the Linux kernel, the following vulnerability has been resolved: nfsd: clear CALLBACK RUNNING on failed delegation recall queue nfsd break one deleg sets NFSD4 CALLBACK RUNNING via test and set bit at entry to serialize recall work, then calls nfsd4 run cb to queue the recall. When the queue...

CVE-2026-74686

This vulnerability affects the Linux kernel 's rqspinlock (queued read-copy spinlock) implementation. When an ABBA deadlock is detected, the waiter queue's tail is not reset, causing the detecting CPU to wait indefinitely for a next waiter that may never arrive. This leads to intermittent stalls ...