RHSA-2026:18134: kernel security update

RHSA-2026:18134, released February 4, 2026, fixes 24 CVEs in kernel (version 6.12.0-211.7.1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

1 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0050

42nd percentile

Priority of the 24 CVEs

Patch now 0
                                Urgent 1
                                High 11
                                Routine 12

Fixed package versions

Product	Release	Fixed in
kernel	RHEL 10	6.12.0-211.7.1.el10_2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2025-40320	linux: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential cfid UAF in smb2_quer...	9.8	0.0042	None reported
High	CVE-2025-40257	mptcp: fix a race in mptcp_pm_del_add_timer()	9.8	0.0050	None reported
High	CVE-2025-40210	Revert "NFSD: Remove the cap on number of operations per NFSv4 COMPOUND"	7.5	0.0036	None reported
High	CVE-2025-39866	fs: writeback: fix use-after-free in __mark_inode_dirty()	7.8	0.0031	None reported
High	CVE-2024-56633	linux: In the Linux kernel, the following vulnerability has been resolved: tcp_bpf: Fix the sk_mem_uncharge logic in tcp_bp...	7.8	0.0028	None reported
High	CVE-2025-38279	bpf: Do not include stack ptr register in precision backtracking bookkeeping	7.8	0.0024	None reported
High	CVE-2025-21839	kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system	7.8	0.0023	None reported
High	CVE-2025-38267	kernel-abi-stablelists: The kernel packages contain the Linux kernel, the core of any Linux operating system	7.8	0.0021	None reported
High	CVE-2025-38346	ftrace: Fix UAF when lookup kallsym after ftrace disabled	7.8	0.0020	None reported
High	CVE-2025-38015	kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system	7.0	0.0020	None reported
High	CVE-2026-23002	kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: x...	7.0	0.0018	None reported
High	CVE-2026-23040	linux: In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: fix typo in frequency noti...	7.6	0.0017	None reported
Routine	CVE-2025-38405	kernel-debug-devel: The kernel packages contain the Linux kernel, the core of any Linux operating system	5.5	0.0043	None reported
Routine	CVE-2025-40134	kernel-64k-debug-modules-core: The kernel packages contain the Linux kernel, the core of any Linux operating system	4.7	0.0023	None reported
Routine	CVE-2025-38275	phy: qcom-qmp-usb: Fix an NULL vs IS_ERR() bug	5.5	0.0021	None reported
Routine	CVE-2025-38470	net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime	5.5	0.0021	None reported
Routine	CVE-2025-38097	espintcp: remove encap socket caching to avoid reference leak	5.5	0.0021	None reported
Routine	CVE-2025-38166	bpf: fix ktls panic with sockmap	5.5	0.0020	None reported
Routine	CVE-2025-40034	kernel-modules: The kernel packages contain the Linux kernel, the core of any Linux operating system	6.6	0.0020	None reported
Routine	CVE-2025-38345	ACPICA: fix acpi operand cache leak in dswstate.c	5.5	0.0020	None reported
Routine	CVE-2025-37980	block: fix resource leak in blk_register_queue() error path	5.5	0.0019	None reported
Routine	CVE-2025-38441	kernel-debug-modules: The kernel packages contain the Linux kernel, the core of any Linux operating system	5.5	0.0019	None reported
Routine	CVE-2025-38202	bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem()	5.5	0.0018	None reported
Routine	CVE-2025-71117	linux: In the Linux kernel, the following vulnerability has been resolved: block: Remove queue freezing from several sysfs...	5.5	0.0010	None reported

Also fixes CVE-2025-40320

SUSE-SU-2026:0315-1
kernel-64kb, kernel-default, kernel-default-base and 6 more on sles 15.7
SUSE-SU-2026:0281-1
kernel-azure, kernel-source-azure, kernel-syms-azure on sles 15.7
SUSE-SU-2026:0278-1
kernel-livepatch-SLE15-SP7-RT_Update_8 on sles 15.7
OPENSUSE-SU-2026:20145-1
dtb-aarch64, kernel-64kb, kernel-azure and 10 more on opensuse-leap 16.0
SUSE-SU-2026:20220-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 16.0
SUSE-SU-2026:0293-1
dtb-aarch64, kernel-64kb, kernel-debug and 10 more on opensuse-leap 15.6, sles 15.6
ELSA-2026-50006
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
ALAS2023-2026-1495
bpftool6.12, bpftool6.12-debuginfo, kernel-livepatch-6.12.58-82.121 and 19 more on amzn 2023

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:18134

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/fix/linux/rhsa-2026-18134">RHSA-2026:18134 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Which servers are still behind?

Patchblox compares the installed package on every Linux machine against the fixed version for its release, including machines reported through Azure Update Manager.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.