Red Hat Security Advisory: kernel security update

CVE-2021-4460 — kernel: Linux kernel: integer overflow and information disclosure via undefined shift operation in drm/amdkfd CVE-2022-49674 — kernel: Linux kernel: Device Mapper RAID out-of-bounds access CVE-2025-38180 — kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem CVE-2025-40240 — kernel: sctp: avoid NULL dereference when chunk data buffer is missing CVE-2025-71085 — kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() CVE-2026-23209 — kernel: macvlan: fix error recovery in macvlan_common_newlink()