CVE-2026-99052 selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts

In the Linux kernel, the following vulnerability has been resolved: selinux: preserve NATIVELABELS on already-initialized sb in setmntopts When an NFSv4 filesystem exported with securitylabel is mounted a second time, sgetfc returns the existing superblock and nfsgetroot calls securitysbsetmntopt...