RHSA-2026:66324 — Security Advisory

An update for kernel-rt 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

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.