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Ubuntu 22.04 Kernel Security Update - Medium Buffer Overflow and Math Flaws

opensuse
Calendar Grey April 29, 2026
Dist Opensuse Esm H88
Critical update for openSUSE resolves important issues in Xen, enhancing system safety against multiple threats.
An update that solves three vulnerabilities can now be installed.

Description

This update for xen fixes the following issues:

* CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-

SN-7053 (bsc#1262428).

* CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).

* CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).

## Special Instructions and Notes:

* Please reboot the system after installing this update.

Topics%20covered

Topics Covered

security advisory DoS important OpenSUSE xen floating point

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 15.5

zypper in -t patch SUSE-2026-1657=1

* SUSE Linux Enterprise Micro 5.5

zypper in -t patch SUSE-SLE-Micro-5.5-2026-1657=1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1657=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5

zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1657=1

* SUSE Linux Enterprise Server 15 SP5 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-1657=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP5

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1657=1

Package List

* openSUSE Leap 15.5 (aarch64 x86_64 i586)

* xen-debugsource-4.17.6_08-150500.3.65.1

* xen-libs-4.17.6_08-150500.3.65.1

* xen-tools-domU-debuginfo-4.17.6_08-150500.3.65.1

* xen-libs-debuginfo-4.17.6_08-150500.3.65.1

* xen-tools-domU-4.17.6_08-150500.3.65.1

* xen-devel-4.17.6_08-150500.3.65.1

* openSUSE Leap 15.5 (x86_64)

* xen-libs-32bit-debuginfo-4.17.6_08-150500.3.65.1

* xen-libs-32bit-4.17.6_08-150500.3.65.1

* openSUSE Leap 15.5 (aarch64 x86_64)

* xen-doc-html-4.17.6_08-150500.3.65.1

* xen-4.17.6_08-150500.3.65.1

* xen-tools-4.17.6_08-150500.3.65.1

* xen-tools-debuginfo-4.17.6_08-150500.3.65.1

* openSUSE Leap 15.5 (noarch)

* xen-tools-xendomains-wait-disk-4.17.6_08-150500.3.65.1

* openSUSE Leap 15.5 (aarch64_ilp32)

* xen-libs-64bit-debuginfo-4.17.6_08-150500.3.65.1

* xen-libs-64bit-4.17.6_08-150500.3.65.1

* SUSE Linux Enterprise Micro 5.5 (x86_64)

* xen-libs-debuginfo-4.17.6_08-150500.3.65.1

* xen-libs-4.17.6_08-150500.3.65.1

* xen-debugsource-4.17.6_08-150500.3.65.1

* SUSE Linux Enterprise High...

Read the Full Advisory

References

* bsc#1262178

* bsc#1262180

* bsc#1262428

## References:

* https://www.suse.com/security/cve/CVE-2025-54505.html

* https://www.suse.com/security/cve/CVE-2026-23557.html

* https://www.suse.com/security/cve/CVE-2026-23558.html

* https://bugzilla.suse.com/show_bug.cgi?id=1262178

* https://bugzilla.suse.com/show_bug.cgi?id=1262180

* https://bugzilla.suse.com/show_bug.cgi?id=1262428

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1657-1
Release Date: 2026-04-29T11:06:54Z
Affected Products: * openSUSE Leap 15.5 * SUSE Linux Enterprise High Performance Computing 15 SP5 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 * SUSE Linux Enterprise Micro 5.5 * SUSE Linux Enterprise Server 15 SP5 * SUSE Linux Enterprise Server 15 SP5 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP5

Topics%20covered

Topics Covered

security advisory DoS important OpenSUSE xen floating point

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