In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix infinite loop in layout state revocation find_one_sb_stid() skips stids whose sc_status is non-zero, but the SC_TYPE_LAYOUT case in nfsd4_revoke_states() never sets sc_status before calling nfsd4_close_layout(). The retry loop therefore finds the same layout stid on every iteration, hanging the revoker indefinitely.

A flaw was found in the Linux kernel's Network File System Daemon (NFSD). This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by triggering an infinite loop during layout state revocation. The issue occurs because the system repeatedly attempts to revoke a layout state without properly updating its status, leading to the revoker hanging indefinitely.

If the NFS server functionality is not required, disable the `nfs-server` service to prevent exploitation. ```bash systemctl stop nfs-server systemctl disable nfs-server ``` This action will stop all NFS server operations and prevent them from starting automatically. If the NFS server is in use, consider restricting network access to trusted clients via firewall rules. Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-64519 https://nvd.nist.gov/vuln/detail/CVE-2026-64519 https://lore.kernel.org/linux-cve-announce/2026072538-CVE-2026-64519-d123@gregkh/T