Issued:: 2026-06-22
Updated:: 2026-06-22

RHSA-2026:27789 - 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 9.

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: can: isotp: fix tx.buf use-after-free in isotp_sendmsg() (CVE-2026-31474)
kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)
kernel: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)
kernel: Bluetooth: hci_sync: fix stack buffer overflow in hci_le_big_create_sync (CVE-2026-31772)
kernel: bnxt_en: Fix RSS context delete logic (CVE-2026-43260)
kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)
kernel: scsi: qla2xxx: Completely fix fcport double free (CVE-2026-43414)
kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)
kernel: gfs2: Fix use-after-free in iomap inline data write path (CVE-2026-45984)
kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056)
kernel: wifi: mac80211: drop stray 'static' from fast-RX rx_result (CVE-2026-46152)
kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)
kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)
kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)
kernel: exit: prevent preemption of oopsing TASK_DEAD task (CVE-2026-46173)
kernel: wifi: mac80211: use safe list iteration in radar detect work (CVE-2026-46166)
kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)

Bug Fix(es) and Enhancement(s):

RHEL9.4 - s390/ap: Expose ap_bindings_complete_count counter via sysfs [rhel-9.8.z] (JIRA:RHEL-166048)
[RHEL 9.8] Hung tasks during both suspend and hibernate operations on systems with Intel E810 NICs [rhel-9.8.z] (JIRA:RHEL-175699)
DPLL: Add support for pin operational state [rhel-9.8.z] (JIRA:RHEL-175820)
DPLL: Add support for fractional frequency offset between pin and device [rhel-9.8.z] (JIRA:RHEL-175823)
ibmveth Adapter Freeze with Small MSS [rhel-9.8.z] (JIRA:RHEL-178308)
RHEL9.4 - s390/mm: Add missing secure storage access fixups [rhel-9.8.z] (JIRA:RHEL-183317)
rbd: eliminate a race in lock_dwork draining on unmap [rhel-9.8.z] (JIRA:RHEL-183130)

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.

Affected Products

Product	Version	Arch
Red Hat Enterprise Linux for x86_64	9	x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions	9.8	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support	9.8	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle	9.8	x86_64
Red Hat Enterprise Linux for Power, little endian	9	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support	9.8	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle	9.8	ppc64le
Red Hat Enterprise Linux for IBM z Systems	9	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support	9.8	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle	9.8	s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates	9.8	s390x
Red Hat Enterprise Linux for ARM 64	9	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support	9.8	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle	9.8	aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates	9.8	aarch64
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions	9.8	ppc64le
Red Hat CodeReady Linux Builder for x86_64	9	x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support	9.8	x86_64
Red Hat CodeReady Linux Builder for Power, little endian	9	ppc64le
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support	9.8	ppc64le
Red Hat CodeReady Linux Builder for IBM z Systems	9	s390x
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support	9.8	s390x
Red Hat CodeReady Linux Builder for ARM 64	9	aarch64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support	9.8	aarch64

Updated Packages

kernel-modules-core-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-64k-debug-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-devel-matched-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-debuginfo-common-x86_64-5.14.0-687.17.1.el9_8.x86_64.rpm
python3-perf-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-modules-core-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-core-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-modules-core-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-modules-extra-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-64k-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-debug-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-tools-libs-devel-5.14.0-687.17.1.el9_8.ppc64le.rpm
perf-5.14.0-687.17.1.el9_8.s390x.rpm
rtla-5.14.0-687.17.1.el9_8.x86_64.rpm
libperf-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-debug-uki-virt-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-devel-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
perf-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-core-5.14.0-687.17.1.el9_8.x86_64.rpm
libperf-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debuginfo-common-ppc64le-5.14.0-687.17.1.el9_8.ppc64le.rpm
python3-perf-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-debug-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-cross-headers-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-devel-matched-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-modules-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-modules-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-64k-debug-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-cross-headers-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-debug-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-debug-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-debug-modules-core-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-tools-libs-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-zfcpdump-modules-core-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-devel-5.14.0-687.17.1.el9_8.s390x.rpm
rtla-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-modules-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-core-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-modules-extra-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-debug-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-64k-debug-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-headers-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-zfcpdump-core-5.14.0-687.17.1.el9_8.s390x.rpm
python3-perf-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-core-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-devel-matched-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-modules-extra-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-libs-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-abi-stablelists-5.14.0-687.17.1.el9_8.noarch.rpm
python3-perf-5.14.0-687.17.1.el9_8.s390x.rpm
perf-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
rv-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-cross-headers-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-doc-5.14.0-687.17.1.el9_8.noarch.rpm
kernel-rt-debug-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-5.14.0-687.17.1.el9_8.src.rpm
kernel-64k-debug-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-debug-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
rv-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-core-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-debug-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-64k-debug-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-devel-5.14.0-687.17.1.el9_8.x86_64.rpm
python3-perf-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-tools-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-libs-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-debug-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
perf-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-devel-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-zfcpdump-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-core-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-devel-matched-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-64k-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-devel-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-modules-core-5.14.0-687.17.1.el9_8.x86_64.rpm
rtla-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-headers-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-64k-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-debug-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-headers-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-devel-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-zfcpdump-devel-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-modules-core-5.14.0-687.17.1.el9_8.x86_64.rpm
libperf-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
rv-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-modules-extra-5.14.0-687.17.1.el9_8.x86_64.rpm
python3-perf-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-64k-debuginfo-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-modules-5.14.0-687.17.1.el9_8.x86_64.rpm
python3-perf-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-devel-matched-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-modules-extra-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-headers-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-debug-devel-matched-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
libperf-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-tools-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-64k-debug-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-devel-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debug-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-debug-modules-extra-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
rv-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-debug-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
perf-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debuginfo-common-s390x-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-modules-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-64k-devel-matched-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-debug-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-devel-matched-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-64k-debug-devel-matched-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-64k-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-core-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-debug-modules-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-zfcpdump-devel-matched-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-zfcpdump-modules-extra-5.14.0-687.17.1.el9_8.s390x.rpm
libperf-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-debug-modules-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-64k-debug-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-uki-virt-addons-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-debug-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-modules-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-5.14.0-687.17.1.el9_8.x86_64.rpm
libperf-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
perf-5.14.0-687.17.1.el9_8.ppc64le.rpm
rtla-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-64k-debug-5.14.0-687.17.1.el9_8.aarch64.rpm
perf-5.14.0-687.17.1.el9_8.x86_64.rpm
libperf-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-debug-core-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-debuginfo-5.14.0-687.17.1.el9_8.x86_64.rpm
python3-perf-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-tools-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-debuginfo-common-aarch64-5.14.0-687.17.1.el9_8.aarch64.rpm
perf-debuginfo-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-rt-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-devel-5.14.0-687.17.1.el9_8.aarch64.rpm
libperf-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-64k-debug-modules-extra-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-modules-extra-5.14.0-687.17.1.el9_8.ppc64le.rpm
kernel-devel-matched-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-rt-64k-debug-core-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-rt-core-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-tools-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-debug-modules-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-debug-core-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-cross-headers-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-modules-extra-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-zfcpdump-debuginfo-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-tools-libs-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-uki-virt-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-zfcpdump-modules-5.14.0-687.17.1.el9_8.s390x.rpm
kernel-rt-debug-devel-5.14.0-687.17.1.el9_8.x86_64.rpm
kernel-64k-debug-modules-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-5.14.0-687.17.1.el9_8.aarch64.rpm
kernel-tools-libs-devel-5.14.0-687.17.1.el9_8.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.