Issued:: 2026-05-19
Updated:: 2026-05-19

RHSA-2026:18134 - Moderate: kernel security update

Synopsis

Moderate: kernel security update

Type/Severity

Security Advisory Moderate

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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: tcp_bpf: Fix the sk_mem_uncharge logic in tcp_bpf_sendmsg (CVE-2024-56633)
kernel: KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop (CVE-2025-21839)
kernel: block: fix resource leak in blk_register_queue() error path (CVE-2025-37980)
kernel: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc (CVE-2025-38015)
kernel: espintcp: remove encap socket caching to avoid reference leak (CVE-2025-38097)
kernel: bpf: fix ktls panic with sockmap (CVE-2025-38166)
kernel: bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem() (CVE-2025-38202)
kernel: bpf: Do not include stack ptr register in precision backtracking bookkeeping (CVE-2025-38279)
kernel: ring-buffer: Do not trigger WARN_ON() due to a commit_overrun (CVE-2025-38267)
kernel: phy: qcom-qmp-usb: Fix an NULL vs IS_ERR() bug (CVE-2025-38275)
kernel: ftrace: Fix UAF when lookup kallsym after ftrace disabled (CVE-2025-38346)
kernel: ACPICA: fix acpi operand cache leak in dswstate.c (CVE-2025-38345)
kernel: nvmet: fix memory leak of bio integrity (CVE-2025-38405)
kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() (CVE-2025-38441)
kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime (CVE-2025-38470)
kernel: fs: writeback: fix use-after-free in __mark_inode_dirty() (CVE-2025-39866)
kernel: PCI/AER: Avoid NULL pointer dereference in aer_ratelimit() (CVE-2025-40034)
kernel: dm: fix NULL pointer dereference in __dm_suspend() (CVE-2025-40134)
kernel: Revert "NFSD: Remove the cap on number of operations per NFSv4 COMPOUND" (CVE-2025-40210)
kernel: Linux kernel MPTCP: Privilege escalation or denial of service via use-after-free in timer handling (CVE-2025-40257)
kernel: smb: client: fix potential cfid UAF in smb2_query_info_compound (CVE-2025-40320)
kernel: wifi: mac80211_hwsim: fix typo in frequency notification (CVE-2026-23040)
kernel: Kernel: Privilege escalation or denial of service in nf_tables via inverted element activity check (CVE-2026-23111)
kernel: Linux kernel: Denial of Service in ice driver due to race condition during VSI rebuild (CVE-2026-23210)
kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from 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	10	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support	10.2	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle	10.2	x86_64
Red Hat Enterprise Linux for x86_64 - 4 years of updates	10.2	x86_64
Red Hat Enterprise Linux for Power, little endian	10	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support	10.2	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle	10.2	ppc64le
Red Hat Enterprise Linux for Power, little endian - 4 years of support	10.2	ppc64le
Red Hat Enterprise Linux for IBM z Systems	10	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support	10.2	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle	10.2	s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates	10.2	s390x
Red Hat Enterprise Linux for ARM 64	10	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support	10.2	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle	10.2	aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates	10.2	aarch64
Red Hat CodeReady Linux Builder for x86_64	10	x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support	10.2	x86_64
Red Hat CodeReady Linux Builder for Power, little endian	10	ppc64le
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support	10.2	ppc64le
Red Hat CodeReady Linux Builder for IBM z Systems	10	s390x
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support	10.2	s390x
Red Hat CodeReady Linux Builder for ARM 64	10	aarch64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support	10.2	aarch64

Updated Packages

kernel-rt-64k-debug-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-debug-devel-matched-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-64k-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-headers-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-zfcpdump-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-modules-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-devel-matched-6.12.0-211.7.1.el10_2.x86_64.rpm
libperf-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
libperf-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-extra-6.12.0-211.7.1.el10_2.s390x.rpm
perf-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debuginfo-common-x86_64-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-extra-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-devel-matched-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-debug-modules-extra-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-debug-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-tools-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
libperf-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-zfcpdump-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-zfcpdump-devel-6.12.0-211.7.1.el10_2.s390x.rpm
rtla-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-64k-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-modules-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-uki-virt-addons-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-doc-6.12.0-211.7.1.el10_2.noarch.rpm
kernel-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-debug-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-tools-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-6.12.0-211.7.1.el10_2.ppc64le.rpm
python3-perf-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
python3-perf-6.12.0-211.7.1.el10_2.ppc64le.rpm
libperf-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-6.12.0-211.7.1.el10_2.src.rpm
rv-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debug-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-64k-debug-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-debug-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-devel-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-debug-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-modules-6.12.0-211.7.1.el10_2.x86_64.rpm
perf-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-modules-extra-matched-6.12.0-211.7.1.el10_2.x86_64.rpm
python3-perf-6.12.0-211.7.1.el10_2.s390x.rpm
rtla-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
perf-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-modules-extra-matched-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-zfcpdump-modules-6.12.0-211.7.1.el10_2.s390x.rpm
libperf-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-debug-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-devel-matched-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-extra-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-64k-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-tools-libs-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-64k-debug-6.12.0-211.7.1.el10_2.aarch64.rpm
python3-perf-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-devel-matched-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-extra-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-debug-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-extra-matched-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-debug-devel-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-cross-headers-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-uki-virt-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-devel-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-64k-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-tools-libs-devel-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-debuginfo-common-s390x-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-zfcpdump-devel-matched-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-headers-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-modules-extra-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-cross-headers-6.12.0-211.7.1.el10_2.ppc64le.rpm
libperf-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-uki-virt-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-64k-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
libperf-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
perf-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-debug-core-6.12.0-211.7.1.el10_2.aarch64.rpm
rtla-6.12.0-211.7.1.el10_2.x86_64.rpm
rv-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-tools-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-debug-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-extra-matched-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-cross-headers-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-modules-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-modules-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-tools-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-uki-virt-addons-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-modules-extra-6.12.0-211.7.1.el10_2.x86_64.rpm
perf-debuginfo-6.12.0-211.7.1.el10_2.ppc64le.rpm
rv-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debuginfo-common-ppc64le-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-headers-6.12.0-211.7.1.el10_2.aarch64.rpm
python3-perf-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-abi-stablelists-6.12.0-211.7.1.el10_2.noarch.rpm
kernel-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-devel-matched-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-modules-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-devel-matched-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-devel-matched-6.12.0-211.7.1.el10_2.aarch64.rpm
perf-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-debug-modules-extra-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-devel-6.12.0-211.7.1.el10_2.x86_64.rpm
python3-perf-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-modules-extra-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-64k-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-64k-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-devel-matched-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-zfcpdump-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-64k-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-64k-debug-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-64k-debug-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-devel-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-debug-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-tools-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-debug-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-tools-libs-devel-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debuginfo-common-aarch64-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-core-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-tools-libs-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-64k-debug-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-zfcpdump-modules-core-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-zfcpdump-modules-extra-6.12.0-211.7.1.el10_2.s390x.rpm
python3-perf-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
perf-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-modules-core-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-rt-modules-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-modules-core-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-64k-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-debuginfo-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-debug-debuginfo-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-modules-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-tools-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-uki-virt-6.12.0-211.7.1.el10_2.x86_64.rpm
perf-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-devel-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-devel-matched-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-debug-6.12.0-211.7.1.el10_2.aarch64.rpm
rtla-6.12.0-211.7.1.el10_2.ppc64le.rpm
rv-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-rt-devel-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-6.12.0-211.7.1.el10_2.x86_64.rpm
python3-perf-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-tools-6.12.0-211.7.1.el10_2.aarch64.rpm
libperf-6.12.0-211.7.1.el10_2.ppc64le.rpm
kernel-headers-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-64k-debug-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-rt-debug-modules-core-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-cross-headers-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-debug-devel-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-rt-64k-modules-core-6.12.0-211.7.1.el10_2.aarch64.rpm
kernel-tools-libs-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-debug-6.12.0-211.7.1.el10_2.s390x.rpm
kernel-tools-libs-devel-6.12.0-211.7.1.el10_2.x86_64.rpm
kernel-tools-debuginfo-6.12.0-211.7.1.el10_2.aarch64.rpm

Fixes

CVEs

References

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
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