RHSA-2025:21920: Security update for 12 packages

RHSA-2025:21920, released November 24, 2025, fixes 3 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

2 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0016

5th percentile

Priority of the 3 CVEs

Patch now 0
                                Urgent 2
                                High 1
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel-rt	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-core	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug-core	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug-devel	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug-kvm	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug-modules	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-debug-modules-extra	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-devel	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-kvm	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-modules	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10
kernel-rt-modules-extra	RHEL 8	0:4.18.0-553.85.1.rt7.426.el8_10

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2025-39971	i40e: fix idx validation in config queues msg	9.8	0.0016	None reported
Urgent	CVE-2025-39973	i40e: add validation for ring_len param	9.8	0.0016	None reported
High	CVE-2025-39697	NFS: Fix a race when updating an existing write	7.6	0.0016	None reported

Also fixes CVE-2025-39973

ELSA-2025-20719
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
SUSE-SU-2025:4057-1
kernel-64kb, kernel-default, kernel-default-base and 6 more on sles 15.7
SUSE-SU-2025:4141-1
kernel-livepatch-SLE15-SP7-RT_Update_6 on sles 15.7
SUSE-SU-2025:4132-1
kernel-azure, kernel-source-azure, kernel-syms-azure on sles 15.7
SUSE-SU-2025:4301-1
kernel-livepatch-SLE15-SP6-RT_Update_17, kernel-rt, kernel-rt_debug and 2 more on opensuse-leap 15.6, sles 15.6
SUSE-SU-2025:4140-1
dtb-aarch64, kernel-64kb, kernel-debug and 10 more on opensuse-leap 15.6, sles 15.6
SUSE-SU-2025:4128-1
kernel-azure, kernel-source-azure, kernel-syms-azure on opensuse-leap 15.6, sles 15.6
OPENSUSE-SU-2025:20091-1
dtb-aarch64, kernel-64kb, kernel-default and 9 more on opensuse-leap 16.0

Vendor advisory

https://access.redhat.com/errata/RHSA-2025:21920

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-2025-21920">RHSA-2025:21920 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.