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SUSE Xen Important Lock Abuse HVM Traversal Vulnern 2026-2668-1

suse
Calendar Grey June 29, 2026
Dist Suse Esm H88
Critical SUSE Linux update for Xen fixes four important issues. Mitigate risks with this essential security patch now available.
An update that solves four vulnerabilities can now be installed.

Summary

## This update for xen fixes the following issues: * CVE-2026-42487: xen: x86 HVM I/O port list traversal (XSA-491) (bsc#1266952). * CVE-2026-42488: xen: x86: mismatched mapcache metadata (XSA-494) (bsc#1266955). * CVE-2026-42489,CVE-2026-42490: xen: domctl lock open to abuse (XSA-492) (bsc#1266953). ## 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 Server 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2668=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2668=1 ## Package List:

Topics%20covered

Topics Covered

security advisory SuSE DoS patch important xen

References

* bsc#1266952

* bsc#1266953

* bsc#1266955

Cross-

* CVE-2026-42487

* CVE-2026-42488

* CVE-2026-42489

* CVE-2026-42490

CVSS scores:

* CVE-2026-42487 ( SUSE ): 8.8

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

* CVE-2026-42487 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

* CVE-2026-42487 ( NVD ): 7.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

* CVE-2026-42488 ( SUSE ): 8.7

CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

* CVE-2026-42488 ( SUSE ): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

* CVE-2026-42488 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-42489 ( SUSE ): 6.8

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2668-1
Release Date: 2026-06-29T05:42:02Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS patch important xen

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