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openSUSE Leap 15.6 Kernel Essential Security Update SUSE-SU-2026-1678-1

opensuse
Calendar Grey April 29, 2026
Dist Opensuse Esm H88
Update addresses 14 security flaws in openSUSE kernel; immediate install recommended to safeguard systems.
An update that solves 14 vulnerabilities and has five security fixes can now be installed.

Description

The SUSE Linux Enterprise 15 SP6 kernel was updated to fix various security

issues

The following security issues were fixed:

* CVE-2025-39998: scsi: target: target_core_configfs: Add length check to

avoid buffer overflow (bsc#1252073).

* CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773).

* CVE-2026-23231: netfilter: nf_tables: fix use-after-free in

nf_tables_addchain() (bsc#1259188).

* CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write

(bsc#1259797).

* CVE-2026-23272: netfilter: nf_tables: unconditionally bump set->nelems

before insertion (bsc#1260009).

* CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer

labels (bsc#1260005).

* CVE-2026-23278: netfilter: nf_tables: always walk all pending catchall

elements (bsc#1259998).

* CVE-2026-23293: net: vxlan: fix nd_tbl NULL dereference when IPv6 is

disabled (bsc#1260486).

* CVE-2026-23317: drm/vmwgfx: Return the correct value in...

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Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important kernel 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:

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-1643=1

* SUSE Linux Enterprise High Availability Extension 15 SP6

zypper in -t patch SUSE-SLE-Product-HA-15-SP6-2026-1643=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1643=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1643=1

* SUSE Linux Enterprise Live Patching 15-SP6

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-1643=1

Package List

* openSUSE Leap 15.6 (noarch nosrc)

* kernel-docs-6.4.0-150600.23.95.1

* openSUSE Leap 15.6 (noarch)

* kernel-docs-html-6.4.0-150600.23.95.1

* kernel-source-6.4.0-150600.23.95.1

* kernel-macros-6.4.0-150600.23.95.1

* kernel-source-vanilla-6.4.0-150600.23.95.1

* kernel-devel-6.4.0-150600.23.95.1

* openSUSE Leap 15.6 (nosrc ppc64le x86_64)

* kernel-debug-6.4.0-150600.23.95.1

* openSUSE Leap 15.6 (ppc64le x86_64)

* kernel-debug-devel-6.4.0-150600.23.95.1

* kernel-debug-debuginfo-6.4.0-150600.23.95.1

* kernel-debug-devel-debuginfo-6.4.0-150600.23.95.1

* kernel-debug-debugsource-6.4.0-150600.23.95.1

* openSUSE Leap 15.6 (x86_64)

* kernel-default-vdso-6.4.0-150600.23.95.1

* kernel-kvmsmall-vdso-debuginfo-6.4.0-150600.23.95.1

* kernel-default-vdso-debuginfo-6.4.0-150600.23.95.1

* kernel-debug-vdso-6.4.0-150600.23.95.1

* kernel-debug-vdso-debuginfo-6.4.0-150600.23.95.1

* kernel-kvmsmall-vdso-6.4.0-150600.23.95.1

* openSUSE Leap 15.6 (aarch64 ppc64le x86_64)

* kernel-kvmsmall-devel-debuginfo-6.4.0-150600.23.95.1

*...

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References

* bsc#1252073

* bsc#1253122

* bsc#1257506

* bsc#1257773

* bsc#1259188

* bsc#1259461

* bsc#1259580

* bsc#1259707

* bsc#1259797

* bsc#1259998

* bsc#1260005

* bsc#1260009

* bsc#1260347

* bsc#1260471

* bsc#1260486

* bsc#1260562

* bsc#1260730

* bsc#1261412

* bsc#1261498

## References:

* https://www.suse.com/security/cve/CVE-2025-39998.html

* https://www.suse.com/security/cve/CVE-2026-23103.html

* https://www.suse.com/security/cve/CVE-2026-23231.html

* https://www.suse.com/security/cve/CVE-2026-23243.html

* https://www.suse.com/security/cve/CVE-2026-23272.html

* https://www.suse.com/security/cve/CVE-2026-23274.html

* https://www.suse.com/security/cve/CVE-2026-23278.html

* https://www.suse.com/security/cve/CVE-2026-23293.html

* https://www.suse.com/security/cve/CVE-2026-23317.html

* https://www.suse.com/security/cve/CVE-2026-23381.html

* https://www.suse.com/security/cve/CVE-2026-23398.html

* https://www.suse.com/security/cve/CVE-2026-23412.html

* https://www.suse.com/security/cve/CVE-2026-23413.html

*...

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Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1643-1
Release Date: 2026-04-28T13:27:24Z
Affected Products: * openSUSE Leap 15.6 * SUSE Linux Enterprise High Availability Extension 15 SP6 * SUSE Linux Enterprise Live Patching 15-SP6 * SUSE Linux Enterprise Real Time 15 SP6 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP6

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important kernel OpenSUSE

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