Security update for the Linux Kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP6)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150600.23.84 fixes various security issues The following security issues were fixed: - CVE-2025-71120: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf (bsc#1256780). - CVE-2026-22999: net/sched: sch_qfq: do not free existing class in qfq_change_class() (bsc#1257238). - CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1258051). - CVE-2026-23111: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate() (bsc#1258183). - CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink() (bsc#1258784). The following non security issue was fixed: - Fix NULL pointer dereference in smb2_query_server_interfaces Livepatch for to restore a null check of server->ops->query_server_interfaces that was dropped by mistake. (bsc#1259896 bsc#1259962).