Issued:: 2026-09-10
Updated:: 2026-09-10

RHSA-2026:66325 - Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

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.

Description

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Affected Products

Product	Version	Arch
Red Hat Enterprise Linux for x86_64	8	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle	8.10	x86_64
Red Hat Enterprise Linux for Power, little endian	8	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle	8.10	ppc64le
Red Hat Enterprise Linux for IBM z Systems	8	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle	8.10	s390x
Red Hat Enterprise Linux for ARM 64	8	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle	8.10	aarch64
Red Hat CodeReady Linux Builder for x86_64	8	x86_64
Red Hat CodeReady Linux Builder for Power, little endian	8	ppc64le
Red Hat CodeReady Linux Builder for ARM 64	8	aarch64

Updated Packages

bpftool-4.18.0-553.162.1.el8_10.aarch64.rpm
bpftool-4.18.0-553.162.1.el8_10.ppc64le.rpm
bpftool-4.18.0-553.162.1.el8_10.s390x.rpm
bpftool-4.18.0-553.162.1.el8_10.x86_64.rpm
bpftool-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
bpftool-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
bpftool-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
bpftool-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-4.18.0-553.162.1.el8_10.src.rpm
kernel-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-abi-stablelists-4.18.0-553.162.1.el8_10.noarch.rpm
kernel-core-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-core-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-core-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-core-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-cross-headers-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-cross-headers-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-cross-headers-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-cross-headers-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-core-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-core-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-core-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-core-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-devel-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-devel-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-devel-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-devel-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-modules-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-modules-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-modules-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-modules-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debug-modules-extra-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debug-modules-extra-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debug-modules-extra-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-debuginfo-common-aarch64-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-debuginfo-common-ppc64le-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-debuginfo-common-s390x-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-debuginfo-common-x86_64-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-devel-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-devel-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-devel-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-devel-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-doc-4.18.0-553.162.1.el8_10.noarch.rpm
kernel-headers-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-headers-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-headers-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-headers-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-modules-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-modules-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-modules-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-modules-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-modules-extra-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-modules-extra-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-modules-extra-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-modules-extra-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-tools-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-tools-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-tools-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-tools-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-tools-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-tools-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-tools-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-tools-libs-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-tools-libs-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-tools-libs-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-tools-libs-devel-4.18.0-553.162.1.el8_10.aarch64.rpm
kernel-tools-libs-devel-4.18.0-553.162.1.el8_10.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-553.162.1.el8_10.x86_64.rpm
kernel-zfcpdump-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-zfcpdump-core-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-zfcpdump-devel-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-zfcpdump-modules-4.18.0-553.162.1.el8_10.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-553.162.1.el8_10.s390x.rpm
perf-4.18.0-553.162.1.el8_10.aarch64.rpm
perf-4.18.0-553.162.1.el8_10.ppc64le.rpm
perf-4.18.0-553.162.1.el8_10.s390x.rpm
perf-4.18.0-553.162.1.el8_10.x86_64.rpm
perf-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
perf-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
perf-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
perf-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm
python3-perf-4.18.0-553.162.1.el8_10.aarch64.rpm
python3-perf-4.18.0-553.162.1.el8_10.ppc64le.rpm
python3-perf-4.18.0-553.162.1.el8_10.s390x.rpm
python3-perf-4.18.0-553.162.1.el8_10.x86_64.rpm
python3-perf-debuginfo-4.18.0-553.162.1.el8_10.aarch64.rpm
python3-perf-debuginfo-4.18.0-553.162.1.el8_10.ppc64le.rpm
python3-perf-debuginfo-4.18.0-553.162.1.el8_10.s390x.rpm
python3-perf-debuginfo-4.18.0-553.162.1.el8_10.x86_64.rpm

Fixes

CVEs

References

https://access.redhat.com/security/updates/classification/#important

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.