RHSA-2026:25218 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

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

Security Fix(es):

• 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: 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: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

• kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

• kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

• kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

• kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

• kernel: net: openvswitch: Avoid releasing netdev before teardown completes (CVE-2026-31508)

• 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.