CVE-2026-42489

Upstream information

CVE-2026-42489 at MITRE

Description

[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]

To create and manage guests, domctl operations are used by the control
domain, a possible Xenstore domain, or by a domain controlling a
particular guest. Some of these operations may not be executed in
parallel, so a system-wide lock is used. The way that lock is acquired
is, however, not providing any fairness. This is CVE-2026-42489.

Furthermore, with XSM/Flask in use, the lock acquire will, for some
operations, occur ahead of any permission checking. This is
CVE-2026-42490.

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SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores

CVSS detail	SUSE
Base Score	5.3
Vector	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
Attack Vector	Local
Attack Complexity	High
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	High
CVSSv3 Version	3.1

CVSS v4 Scores

CVSS detail	SUSE
Base Score	6.8
Vector	CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Attack Vector	Local
Attack Complexity	High
Attack Requirements	None
Privileges Required	High
User Interaction	None
Vulnerable System Confidentiality Impact	None
Vulnerable System Integrity Impact	None
Vulnerable System Availability Impact	High
Subsequent System Confidentiality Impact	None
Subsequent System Integrity Impact	None
Subsequent System Availability Impact	High
CVSSv4 Version	4.0

Note from the SUSE Security Team on the xen package

This issue likely only affects the XEN hypervisor itself, unless otherwise stated. The userland utilities in -tools and libraries in -libs are shipped together with the xen hypervisor as they are built from one source and do not contain hypervisor specific fixes.

SUSE Bugzilla entry: 1266953 [NEW]

SUSE Security Advisories:

• SUSE-SU-2026:2328-1, published 2026-06-10T07:39:28Z
• SUSE-SU-2026:2329-1, published 2026-06-10T07:39:36Z
• SUSE-SU-2026:2364-1, published 2026-06-11T06:54:28Z

List of released packages

Product(s)	Fixed package version(s)	References
Image SLES15-SP5-Azure-3P Image SLES15-SP5-Azure-Basic Image SLES15-SP5-Azure-Standard Image SLES15-SP5-BYOS-Azure Image SLES15-SP5-BYOS-GCE Image SLES15-SP5-GCE Image SLES15-SP5-Hardened-BYOS-Azure Image SLES15-SP5-Hardened-BYOS-GCE Image SLES15-SP5-SAPCAL-Azure Image SLES15-SP5-SAPCAL-GCE	xen-libs >= 4.17.6_12-150500.3.73.1
Image SLES15-SP5-BYOS-EC2 Image SLES15-SP5-EC2 Image SLES15-SP5-Hardened-BYOS-EC2 Image SLES15-SP5-SAPCAL-EC2	xen-libs >= 4.17.6_12-150500.3.73.1 xen-tools-domU >= 4.17.6_12-150500.3.73.1
Image SLES15-SP6-BYOS Image SLES15-SP6-BYOS-EC2 Image SLES15-SP6-EC2-ECS-HVM Image SLES15-SP6-Hardened-BYOS Image SLES15-SP6-Hardened-BYOS-EC2 Image SLES15-SP6-SAP Image SLES15-SP6-SAP-EC2 Image SLES15-SP6-SAPCAL Image SLES15-SP6-SAPCAL-EC2	xen-libs >= 4.18.5_18-150600.3.50.1 xen-tools-domU >= 4.18.5_18-150600.3.50.1
Image SLES15-SP6 Image SLES15-SP6-Azure-3P Image SLES15-SP6-Azure-Basic Image SLES15-SP6-Azure-Standard Image SLES15-SP6-BYOS-Azure Image SLES15-SP6-BYOS-GCE Image SLES15-SP6-GCE Image SLES15-SP6-Hardened-BYOS-Azure Image SLES15-SP6-Hardened-BYOS-GCE Image SLES15-SP6-SAP-Azure Image SLES15-SP6-SAP-GCE Image SLES15-SP6-SAPCAL-Azure Image SLES15-SP6-SAPCAL-GCE	xen-libs >= 4.18.5_18-150600.3.50.1
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7	xen-libs >= 4.20.3_06-150700.3.41.1 xen-tools-domU >= 4.20.3_06-150700.3.41.1	Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-2364
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS	xen >= 4.17.6_12-150500.3.73.1 xen-devel >= 4.17.6_12-150500.3.73.1 xen-libs >= 4.17.6_12-150500.3.73.1 xen-tools >= 4.17.6_12-150500.3.73.1 xen-tools-domU >= 4.17.6_12-150500.3.73.1 xen-tools-xendomains-wait-disk >= 4.17.6_12-150500.3.73.1	Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2328
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS	xen >= 4.17.6_12-150500.3.73.1 xen-devel >= 4.17.6_12-150500.3.73.1 xen-libs >= 4.17.6_12-150500.3.73.1 xen-tools >= 4.17.6_12-150500.3.73.1 xen-tools-domU >= 4.17.6_12-150500.3.73.1 xen-tools-xendomains-wait-disk >= 4.17.6_12-150500.3.73.1	Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2328
SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7	xen >= 4.20.3_06-150700.3.41.1 xen-devel >= 4.20.3_06-150700.3.41.1 xen-libs >= 4.20.3_06-150700.3.41.1 xen-tools >= 4.20.3_06-150700.3.41.1 xen-tools-domU >= 4.20.3_06-150700.3.41.1 xen-tools-xendomains-wait-disk >= 4.20.3_06-150700.3.41.1	Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-2364 SUSE-SLE-Module-Server-Applications-15-SP7-2026-2364
SUSE Linux Enterprise Micro 5.5	xen-libs >= 4.17.6_12-150500.3.73.1	Patchnames: SUSE-SLE-Micro-5.5-2026-2328
SUSE Linux Enterprise Module for Server Applications 15 SP7	xen >= 4.20.3_06-150700.3.41.1 xen-devel >= 4.20.3_06-150700.3.41.1 xen-tools >= 4.20.3_06-150700.3.41.1 xen-tools-xendomains-wait-disk >= 4.20.3_06-150700.3.41.1	Patchnames: SUSE-SLE-Module-Server-Applications-15-SP7-2026-2364
SUSE Linux Enterprise Server 15 SP5-LTSS	xen >= 4.17.6_12-150500.3.73.1 xen-devel >= 4.17.6_12-150500.3.73.1 xen-libs >= 4.17.6_12-150500.3.73.1 xen-tools >= 4.17.6_12-150500.3.73.1 xen-tools-domU >= 4.17.6_12-150500.3.73.1 xen-tools-xendomains-wait-disk >= 4.17.6_12-150500.3.73.1	Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2328
SUSE Linux Enterprise Server 15 SP6-LTSS	xen >= 4.18.5_18-150600.3.50.1 xen-devel >= 4.18.5_18-150600.3.50.1 xen-libs >= 4.18.5_18-150600.3.50.1 xen-tools >= 4.18.5_18-150600.3.50.1 xen-tools-domU >= 4.18.5_18-150600.3.50.1 xen-tools-xendomains-wait-disk >= 4.18.5_18-150600.3.50.1	Patchnames: SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2329
SUSE Linux Enterprise Server for SAP Applications 15 SP5	xen >= 4.17.6_12-150500.3.73.1 xen-devel >= 4.17.6_12-150500.3.73.1 xen-libs >= 4.17.6_12-150500.3.73.1 xen-tools >= 4.17.6_12-150500.3.73.1 xen-tools-domU >= 4.17.6_12-150500.3.73.1 xen-tools-xendomains-wait-disk >= 4.17.6_12-150500.3.73.1	Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2328
SUSE Linux Enterprise Server for SAP Applications 15 SP6	xen >= 4.18.5_18-150600.3.50.1 xen-devel >= 4.18.5_18-150600.3.50.1 xen-libs >= 4.18.5_18-150600.3.50.1 xen-tools >= 4.18.5_18-150600.3.50.1 xen-tools-domU >= 4.18.5_18-150600.3.50.1 xen-tools-xendomains-wait-disk >= 4.18.5_18-150600.3.50.1	Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2329

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First public cloud image revisions this CVE is fixed in:

• amazon/suse-sles-15-sp5-byos-v20260617-hvm-ssd-x86_64
• amazon/suse-sles-15-sp5-hardened-byos-v20260617-hvm-ssd-x86_64
• amazon/suse-sles-15-sp5-sapcal-v20260617-hvm-ssd-x86_64
• amazon/suse-sles-15-sp5-v20260617-ecs-hvm-ssd-x86_64
• amazon/suse-sles-15-sp5-v20260617-hvm-ssd-x86_64
• google/sles-15-sp5-byos-v20260617-x86-64
• google/sles-15-sp5-hardened-byos-v20260617-x86-64
• google/sles-15-sp5-sapcal-v20260617-x86-64
• google/sles-15-sp5-v20260617-x86-64
• google/sles-15-sp6-byos-v20260618-x86-64
• google/sles-15-sp6-hardened-byos-v20260618-x86-64
• google/sles-15-sp6-sapcal-v20260618-x86-64
• google/sles-15-sp6-v20260618-x86-64

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Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s)	Source package	State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7	xen	Released
SUSE Linux Enterprise High Performance Computing 15 SP7	xen	Released
SUSE Linux Enterprise Micro 5.3	xen	Affected
SUSE Linux Enterprise Micro 5.4	xen	Affected
SUSE Linux Enterprise Micro 5.5	xen	Released
SUSE Linux Enterprise Module for Basesystem 15 SP7	xen	Released
SUSE Linux Enterprise Module for Server Applications 15 SP7	xen	Released
SUSE Linux Enterprise Server 15 SP7	xen	Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7	xen	Released
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP5	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS	xen	Released
SUSE Linux Enterprise Module for Basesystem 15 SP4	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP5	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP6	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP4	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP5	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6	xen	Affected
SUSE Linux Enterprise Server 12 SP5	xen	Affected
SUSE Linux Enterprise Server 12 SP5-LTSS	xen	Affected
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security	xen	Affected
SUSE Linux Enterprise Server 15 SP4	xen	Affected
SUSE Linux Enterprise Server 15 SP4-LTSS	xen	Affected
SUSE Linux Enterprise Server 15 SP5	xen	Affected
SUSE Linux Enterprise Server 15 SP5-LTSS	xen	Released
SUSE Linux Enterprise Server 15 SP6	xen	Affected
SUSE Linux Enterprise Server 15 SP6-LTSS	xen	Released
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6	xen	Released
SUSE Manager Proxy 4.3	xen	Affected
SUSE Manager Proxy LTS 4.3	xen	Affected
SUSE Manager Retail Branch Server 4.3	xen	Affected
SUSE Manager Retail Branch Server LTS 4.3	xen	Affected
SUSE Manager Server 4.3	xen	Affected
SUSE Manager Server LTS 4.3	xen	Affected
Products past their end of life and not receiving proactive updates anymore.
SUSE CaaS Platform 4.0	xen	Affected
SUSE Enterprise Storage 6	xen	Affected
SUSE Enterprise Storage 7	xen	Affected
SUSE Enterprise Storage 7.1	xen	Affected
SUSE Linux Enterprise Desktop 12 SP4	xen	Affected
SUSE Linux Enterprise Desktop 15 SP1	xen	Affected
SUSE Linux Enterprise Desktop 15 SP2	xen	Affected
SUSE Linux Enterprise Desktop 15 SP3	xen	Affected
SUSE Linux Enterprise Desktop 15 SP4	xen	Affected
SUSE Linux Enterprise Desktop 15 SP5	xen	Affected
SUSE Linux Enterprise Desktop 15 SP6	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP1	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP2	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP3	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS	xen	Released
SUSE Linux Enterprise High Performance Computing 15 SP6	xen	Affected
SUSE Linux Enterprise Micro 5.0	xen	Affected
SUSE Linux Enterprise Micro 5.1	xen	Affected
SUSE Linux Enterprise Micro 5.2	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP1	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP2	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP3	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP1	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP2	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP3	xen	Affected
SUSE Linux Enterprise Real Time 15 SP2	xen	Affected
SUSE Linux Enterprise Real Time 15 SP3	xen	Affected
SUSE Linux Enterprise Real Time 15 SP4	xen	Affected
SUSE Linux Enterprise Server 12 SP4	xen	Affected
SUSE Linux Enterprise Server 12 SP4-ESPOS	xen	Affected
SUSE Linux Enterprise Server 12 SP4-LTSS	xen	Affected
SUSE Linux Enterprise Server 15 SP1	xen	Affected
SUSE Linux Enterprise Server 15 SP1-BCL	xen	Affected
SUSE Linux Enterprise Server 15 SP1-LTSS	xen	Affected
SUSE Linux Enterprise Server 15 SP2	xen	Affected
SUSE Linux Enterprise Server 15 SP2-BCL	xen	Affected
SUSE Linux Enterprise Server 15 SP2-LTSS	xen	Affected
SUSE Linux Enterprise Server 15 SP3	xen	Affected
SUSE Linux Enterprise Server 15 SP3-BCL	xen	Affected
SUSE Linux Enterprise Server 15 SP3-LTSS	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4	xen	Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5	xen	Released
SUSE Linux Enterprise Software Development Kit 12 SP4	xen	Affected
SUSE Linux Enterprise Software Development Kit 12 SP5	xen	Affected
SUSE Manager Proxy 4.0	xen	Affected
SUSE Manager Proxy 4.1	xen	Affected
SUSE Manager Proxy 4.2	xen	Affected
SUSE Manager Retail Branch Server 4.0	xen	Affected
SUSE Manager Retail Branch Server 4.1	xen	Affected
SUSE Manager Retail Branch Server 4.2	xen	Affected
SUSE Manager Server 4.0	xen	Affected
SUSE Manager Server 4.1	xen	Affected
SUSE Manager Server 4.2	xen	Affected
SUSE OpenStack Cloud 9	xen	Affected
SUSE OpenStack Cloud Crowbar 9	xen	Affected
openSUSE Leap 15.3	xen	Affected
openSUSE Leap 15.4	xen	Affected
openSUSE Leap 15.5	xen	Released
openSUSE Leap 15.6	xen	Released
openSUSE Leap Micro 5.2	xen	Affected
openSUSE Leap Micro 5.3	xen	Affected
openSUSE Leap Micro 5.4	xen	Affected
openSUSE Leap Micro 5.5	xen	Affected

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SUSE Timeline for this CVE

CVE page created: Fri May 29 17:35:40 2026
CVE page last modified: Thu Jun 18 21:28:00 2026