Security update for the Linux Kernel RT (Live Patch 3 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.8.1 fixes various security issues: The following security issues were fixed: - CVE-2026-23240: tls: Fix race condition in tls_sw_cancel_work_tx() (bsc#1262404). - CVE-2026-31738: vxlan: validate ND option lengths in vxlan_na_create (bsc#1264060). - CVE-2026-43038: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (bsc#1271648). - CVE-2026-46113: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (bsc#1266970). - CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected role (bsc#1270060). - CVE-2026-53366: ipv4: account for fraggap on the paged allocation path (bsc#1271370).