RHSA-2026:25533 — Security Advisory

Red Hat Security Advisory: kernel security update

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Severity

Critical

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · June 13, 2026

Updated · November 4, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On and Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: nvme: avoid double free special payload (CVE-2024-41073)
kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)
kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)
kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)
kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)
kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)
kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)
kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)
kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)
kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)
kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532)
kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)
kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037)
kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)
kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)
kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.