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SUSE Linux Enterprise 16 Important Kernel Live Patch 2026-21218-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
An important update for SUSE Linux fixes three security risks in the kernel providing stable patch options.
An update that solves three vulnerabilities can now be installed.

Summary

## This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.26.1 fixes various security issues The following security issues were fixed: * CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1258051). * CVE-2026-23111: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate() (bsc#1258183). * CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink() (bsc#1258784). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-532=1 * SUSE Linux Enterprise Server for SAP applications 16.0

Topics%20covered

Topics Covered

security advisory DoS important SuSE Linux Linux kernel live patch

References

* bsc#1258051

* bsc#1258183

* bsc#1258784

Cross-

* CVE-2026-23074

* CVE-2026-23111

* CVE-2026-23209

CVSS scores:

* CVE-2026-23074 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-23074 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23074 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23074 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23111 ( SUSE ): 8.5

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-23111 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23111 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23111 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21218-1
Release Date: 2026-04-13T02:13:48Z
Rating: important

Topics%20covered

Topics Covered

security advisory DoS important SuSE Linux Linux kernel live patch

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