CVE-2026-89661

CVE-2026-89661 is a use-after-free in the Linux kernel's NFSD (NFS server daemon) subsystem. Writing a filesystem path to /proc/fs/nfsd/unlock_filesystem calls nfsd4_cancel_copy_by_sb() before the nfsd_mutex is held and before the handler confirms the server is still running. After shutdown, nfs4...

EUVD-2026-76573

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent post-shutdown use-after-free in unlockfilesystem Writing a filesystem path to /proc/fs/nfsd/unlockfilesystem runs nfsd4cancelcopybysb before nfsdmutex is held and before the handler confirms that nn-nfsdserv is set...

CVE-2026-89661 NFSD: Prevent post-shutdown use-after-free in unlock_filesystem

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent post-shutdown use-after-free in unlockfilesystem Writing a filesystem path to /proc/fs/nfsd/unlockfilesystem runs nfsd4cancelcopybysb before nfsdmutex is held and before the handler confirms that nn-nfsdserv is set...