RHSA-2026:24343: kernel security update

RHSA-2026:24343, released May 15, 2026, fixes 9 CVEs in kernel (version 6.12.0-55.77.1.el10_0). 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

0.0069

52nd percentile

Priority of the 9 CVEs

Patch now 0
                                Urgent 1
                                High 8
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel	RHEL 10	6.12.0-55.77.1.el10_0

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2025-68366	linux: In the Linux kernel, the following vulnerability has been resolved: nbd: defer config unlock in nbd_genl_connect Th...	8.8	0.0020	None reported
High	CVE-2026-43037	ip6_tunnel: clear skb2->cb[] in ip4ip6_err()	9.8	0.0069	None reported
High	CVE-2026-31685	netfilter: ip6t_eui64: reject invalid MAC header for all packets	9.4	0.0049	None reported
High	CVE-2026-31709	smb: client: validate the whole DACL before rewriting it in cifsacl	8.8	0.0035	None reported
High	CVE-2026-31607	usbip: validate number_of_packets in usbip_pack_ret_submit()	9.8	0.0031	None reported
High	CVE-2026-43110	linux: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF ev...	8.8	0.0027	None reported
High	CVE-2026-43038	kpatch-patch-4_18_0-553_109_1: This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a run...	9.8	0.0026	None reported
High	CVE-2026-23392	netfilter: nf_tables: release flowtable after rcu grace period on error	8.8	0.0017	None reported
High	CVE-2026-23270	linux: In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/i...	8.1	0.0014	None reported

Also fixes CVE-2025-68366

ELSA-2026-50112
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
ELSA-2026-21556
kernel, kernel-abi-stablelists, kernel-core and 26 more on ol 9
RHSA-2026:21556
kernel, kernel-64k, kernel-64k-core and 69 more on RHEL 9
ALSA-2026:21556
kernel, kernel-64k, kernel-64k-core and 71 more on almalinux 9
RLSA-2026:21556
kernel on rocky 9
ELSA-2026-50145
bpftool, kernel-uek, kernel-uek-container and 16 more on ol 8, ol 9
OPENSUSE-SU-2026:20287-1
dtb-aarch64, kernel-64kb, kernel-azure and 10 more on opensuse-leap 16.0
SUSE-SU-2026:20599-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 16.0

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:24343

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