RHSA-2026:19664: Security update for 12 packages

RHSA-2026:19664, released May 27, 2026, fixes 3 CVEs across 12 products. One of them is being exploited (CVE-2026-46300); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEV

CVEs closed

None rated Critical

Exploited

CVE-2026-46300

Highest CVSS

8.8

Base score, 0 to 10

Highest EPSS

0.1613

96th percentile

Priority of the 3 CVEs

Patch now 1
                                Urgent 0
                                High 2
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel-rt	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-core	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug-core	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug-devel	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug-kvm	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug-modules	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-debug-modules-extra	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-devel	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-kvm	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-modules	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10
kernel-rt-modules-extra	RHEL 8	0:4.18.0-553.125.1.rt7.466.el8_10

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Patch now	CVE-2026-46300	net: skbuff: preserve shared-frag marker during coalescing	8.1	0.1613	KEVExploited
High	CVE-2026-46333	ptrace: slightly saner 'get_dumpable()' logic	8.1	0.0430	None reported
High	CVE-2026-43503	net: skbuff: propagate shared-frag marker through frag-transfer helpers	8.8	0.0199	None reported

Also fixes CVE-2026-46300

ALSA-2026:19568
kernel, kernel-64k, kernel-64k-core and 71 more on almalinux 9
RLSA-2026:19568
kernel on rocky 9
RHSA-2026:19568
kernel, kernel-64k, kernel-64k-core and 69 more on RHEL 9
ALSA-2026:19569
kernel, kernel-64k, kernel-64k-core and 72 more on almalinux 10
RLSA-2026:19569
kernel on rocky 10
SUSE-SU-2026:2238-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 15.7
ELSA-2026-19568
kernel, kernel-abi-stablelists, kernel-core and 26 more on ol 9
ELSA-2026-19569
kernel, kernel-abi-stablelists, kernel-core and 27 more on ol 10

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:19664

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