CVE-2026-46256

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages<br /> <br /> LOCALIO is an NFS loopback mount optimization that avoids using the<br /> network for READ, WRITE and COMMIT if the NFS client and server are<br /> determined to be on the same system. But because LOCALIO is still<br /> fundamentally "just NFS loopback mount" it is susceptible to recursion<br /> deadlock via direct reclaim, e.g.: NFS LOCALIO down to XFS and then<br /> back into NFS via nfs_writepages.<br /> <br /> Fix LOCALIO&amp;#39;s potential for direct reclaim deadlock by ensuring that<br /> all its page cache allocations are done from GFP_NOFS context.<br /> <br /> Thanks to Ben Coddington for pointing out commit ad22c7a043c2 ("xfs:<br /> prevent stack overflows from page cache allocation").