RHSA-2026:66325 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.

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: Linux kernel: Denial of Service in qla2xxx SCSI driver due to improper command handling after chip reset (CVE-2025-68745)

• kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)

• kernel: netfilter: nf_log: validate MAC header was set before dumping it (CVE-2026-52942)

• kernel: sctp: diag: reject stale associations in dump_one path (CVE-2026-52917)

• kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091)

• kernel: netfilter: nf_conntrack_sip: don't use simple_strtoul (CVE-2026-52986)

• kernel: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (CVE-2026-53246)

• kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done (CVE-2026-63801)

• kernel: sctp: fix race between sctp_wait_for_connect and peeloff (CVE-2026-63971)

• kernel: security/keys: fix missed RCU read section on lookup (CVE-2026-64015)

• kernel: ixgbevf: fix use-after-free in VEPA multicast source pruning (CVE-2026-64113)

• kernel: sctp: fix auth_hmacs array size in struct sctp_cookie (CVE-2026-68376)

• kernel: tipc: clear sock->sk on the failed-insert path in tipc_sk_create() (CVE-2026-68117)

• kernel: sctp: auth: verify auth requirement when auth_chunk is NULL (CVE-2026-68300)

• kernel: sctp: validate stream count in sctp_process_strreset_inreq() (CVE-2026-68315)

Bug Fix(es) and Enhancement(s):

• scsi: mpt3sas: avoid freeing unallocated PCIe SGL buffers [rhel 8.6.z] (JIRA:RHEL-194117)

• gfs2: harden gfs2_glock_hold [RHEL-8] (JIRA:RHEL-240340)

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.