RHSA-2026:23224 — 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: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al (CVE-2025-38653)

• kernel: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit (CVE-2025-39766)

• kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

• kernel: Linux kernel: Denial of Service in ice driver due to race condition during VSI rebuild (CVE-2026-23210)

• kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)

• kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

• kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service (CVE-2026-31419)

• kernel: usbip: validate number_of_packets in usbip_pack_ret_submit() (CVE-2026-31607)

• 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: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)

• kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163)

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.