RHSA-2026:21745: Security update for 12 packages

RHSA-2026:21745, released June 24, 2026, fixes 19 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0159

75th percentile

Priority of the 19 CVEs

Patch now 0
                                Urgent 0
                                High 19
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel-rt	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-core	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug-core	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug-devel	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug-kvm	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug-modules	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-debug-modules-extra	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-devel	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-kvm	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-modules	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10
kernel-rt-modules-extra	RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-23455	kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: check for zero leng...	9.1	0.0159	None reported
High	CVE-2026-46195	smb: client: validate dacloffset before building DACL pointers	9.8	0.0068	None reported
High	CVE-2026-31685	netfilter: ip6t_eui64: reject invalid MAC header for all packets	9.4	0.0049	None reported
High	CVE-2026-43158	linux: In the Linux kernel, the following vulnerability has been resolved: xfs: fix freemap adjustments when adding xattrs...	8.8	0.0047	None reported
High	CVE-2026-43190	kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length befo...	8.2	0.0046	None reported
High	CVE-2025-71116	libceph: make decode_pool() more resilient against corrupted osdmaps	8.1	0.0046	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-2026-31408	Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold	8.8	0.0032	None reported
High	CVE-2026-43051	linux: In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix out-of-bounds read in wacom_intu...	8.1	0.0026	None reported
High	CVE-2026-23243	RDMA/umad: Reject negative data_len in ib_umad_write	7.8	0.0018	None reported
High	CVE-2025-68347	linux: In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: fix buffer overflow in hwde...	7.8	0.0018	None reported
High	CVE-2026-31532	can: raw: fix ro->uniq use-after-free in raw_rcv()	8.8	0.0017	None reported
High	CVE-2025-68183	linux: In the Linux kernel, the following vulnerability has been resolved: ima: don't clear IMA_DIGSIG flag when setting or...	7.8	0.0015	None reported
High	CVE-2025-39981	Bluetooth: MGMT: Fix possible UAFs	7.8	0.0015	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
High	CVE-2026-43027	linux: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_helper: pass helper to e...	7.8	0.0013	None reported
High	CVE-2026-43020	linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate LTK enc_size on load...	7.8	0.0013	None reported
High	CVE-2026-31684	net: sched: act_csum: validate nested VLAN headers	7.8	0.0012	None reported
High	CVE-2026-43163	linux: In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resiz...	8.1	0.0009	None reported

Also fixes CVE-2026-23455

SUSE-SU-2026:2238-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 15.7
ELSA-2026-50372
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
ALAS2023-2026-1681
bpftool, bpftool-debuginfo, kernel and 19 more on amzn 2023
ALAS2023-2026-1596
bpftool6.18, bpftool6.18-debuginfo, kernel-livepatch-6.18.20-20.229 and 19 more on amzn 2023
ALAS2023-2026-1594
bpftool6.12, bpftool6.12-debuginfo, kernel-livepatch-6.12.79-101.147 and 19 more on amzn 2023
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

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:21745

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