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openSUSE Kernel Important Security Update 2026-3256-1 for Threats

opensuse
Calendar Grey July 27, 2026
Scroller Opensuse
Critical update addressing six significant security issues in openSUSE's kernel, improving system resilience and safety.
A security update for the SUSE Linux Kernel addresses six vulnerabilities with significant CVSS scores, impacting various SUSE products, and provides installation instructions for ...

Description

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.52 fixes

various security issues:

The following security issues were fixed:

* CVE-2026-23240: tls: Fix race condition in tls_sw_cancel_work_tx()

(bsc#1262404).

* CVE-2026-31738: vxlan: validate ND option lengths in vxlan_na_create

(bsc#1264060).

* CVE-2026-43038: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()

(bsc#1271648).

* CVE-2026-46113: KVM: x86: Fix shadow paging use-after-free due to unexpected

GFN (bsc#1266970).

* CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected

role (bsc#1270060).

* CVE-2026-53366: ipv4: account for fraggap on the paged allocation path

(bsc#1271370).

Topics%20covered

Topics Covered

security advisory security issue kernel update important threat mitigation OpenSUSE

Patch

## 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 Live Patching 15-SP6

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-3260=1 SUSE-SLE-

Module-Live-Patching-15-SP6-2026-3256=1 SUSE-SLE-Module-Live-

Patching-15-SP6-2026-3255=1 SUSE-SLE-Module-Live-Patching-15-SP6-2026-3258=1

SUSE-SLE-Module-Live-Patching-15-SP6-2026-3257=1 SUSE-SLE-Module-Live-

Patching-15-SP6-2026-3259=1

* SUSE Linux Enterprise Live Patching 15-SP7

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP7-2026-3263=1

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-3256=1 SUSE-2026-3255=1 SUSE-2026-3258=1

SUSE-2026-3257=1 SUSE-2026-3259=1 SUSE-2026-3260=1

Package List

* SUSE Linux Enterprise Live Patching 15-SP6 (ppc64le s390x x86_64)

* kernel-livepatch-6_4_0-150600_23_95-default-7-150600.2.1

* kernel-livepatch-6_4_0-150600_23_92-default-debuginfo-7-150600.2.1

* kernel-livepatch-6_4_0-150600_23_87-default-9-150600.2.1

* kernel-livepatch-SLE15-SP6_Update_20-debugsource-9-150600.2.1

* kernel-livepatch-SLE15-SP6_Update_21-debugsource-7-150600.2.1

* kernel-livepatch-6_4_0-150600_23_87-default-debuginfo-9-150600.2.1

* kernel-livepatch-6_4_0-150600_23_100-default-debuginfo-6-150600.2.1

* kernel-livepatch-6_4_0-150600_23_103-default-debuginfo-5-150600.2.1

* kernel-livepatch-SLE15-SP6_Update_23-debugsource-6-150600.2.1

* kernel-livepatch-SLE15-SP6_Update_24-debugsource-5-150600.2.1

* kernel-livepatch-6_4_0-150600_23_100-default-6-150600.2.1

* kernel-livepatch-SLE15-SP6_Update_19-debugsource-10-150600.2.1

* kernel-livepatch-6_4_0-150600_23_92-default-7-150600.2.1

* kernel-livepatch-6_4_0-150600_23_95-default-debuginfo-7-150600.2.1

*...

Read the Full Advisory

References

* bsc#1262404

* bsc#1264060

* bsc#1266970

* bsc#1270060

* bsc#1271370

* bsc#1271648

## References:

* https://www.suse.com/security/cve/CVE-2026-23240.html

* https://www.suse.com/security/cve/CVE-2026-31738.html

* https://www.suse.com/security/cve/CVE-2026-43038.html

* https://www.suse.com/security/cve/CVE-2026-46113.html

* https://www.suse.com/security/cve/CVE-2026-53359.html

* https://www.suse.com/security/cve/CVE-2026-53366.html

* https://bugzilla.suse.com/show_bug.cgi?id=1262404

* https://bugzilla.suse.com/show_bug.cgi?id=1264060

* https://bugzilla.suse.com/show_bug.cgi?id=1266970

* https://bugzilla.suse.com/show_bug.cgi?id=1270060

* https://bugzilla.suse.com/show_bug.cgi?id=1271370

* https://bugzilla.suse.com/show_bug.cgi?id=1271648

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:3256-1
Release Date: 2026-07-27T07:33:42Z

Topics%20covered

Topics Covered

security advisory security issue kernel update important threat mitigation OpenSUSE

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