backport/fix for CVE-2026-43198 missing 6.12.x ?

Looking in latest 6.12.x kernel I cannot find any evidence of a fix for CVE-2026-43198.
Is it missing or is 6.12.x unaffected ?


CVE-2026-43198:
tcp: fix potential race in tcp_v6_syn_recv_sock() Code in tcp_v6_syn_recv_sock() after the call to
tcp_v4_syn_recv_sock() is done too late. After tcp_v4_syn_recv_sock(), the child socket is already
visible from TCP ehash table and other cpus might use it. Since newinet->pinet6 is still pointing
to the listener ipv6_pinfo bad things can happen as syzbot found. Move the problematic code in
tcp_v6_mapped_child_init() and call this new helper from tcp_v4_syn_recv_sock() before the ehash
insertion. This allows the removal of one tcp_sync_mss(), since tcp_v4_syn_recv_sock() will call it
with the correct context.