CVE-2026-89679 nfsd: fix null dereference in nfsd4_setattr for deleg timestamp attrs

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix null dereference in nfsd4setattr for deleg timestamp attrs When a SETATTR request includes FATTR4WORD2TIMEDELEGACCESS or FATTR4WORD2TIMEDELEGMODIFY in the attribute bitmap, nfsd4setattr sets delegattrs=true and calls...

CVE-2026-89679

A null pointer dereference in the Linux kernel's NFS server (nfsd) component affects nfsd4_setattr() when handling delegation timestamp attributes. If a client sends the NFSv4 "one stateid" (all-0xFF bytes) alongside FATTR4_WORD2_TIME_DELEG_ACCESS or FATTR4_WORD2_TIME_DELEG_MODIFY in a SETATTR re...