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SUSE Linux 15 SP6 Kernel Important Security Update 2026-1266-1

suse
Calendar Grey April 13, 2026
Dist Suse Esm H88
SUSE Linux kernel important update fixes multiple security issues with a vital advisory for admins to apply promptly.
An update that solves three vulnerabilities and has two security fixes can now be installed.

Summary

## This update for the SUSE Linux Enterprise Kernel 6.4.0-150600.23.87 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). The following non security issue was fixed: * Fix NULL pointer dereference in smb2_query_server_interfaces Livepatch for to restore a null check of server->ops->query_server_interfaces that was dropped by mistake. (bsc#1259896 bsc#1259962). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

Topics%20covered

Topics Covered

security advisory update DoS important kernel SuSE Linux

References

* bsc#1258051

* bsc#1258183

* bsc#1258784

* bsc#1259896

* bsc#1259962

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

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2026:1266-1
Release Date: 2026-04-11T11:04:41Z
Rating: important

Topics%20covered

Topics Covered

security advisory update DoS important kernel SuSE Linux

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