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openSUSE 15.5 SUSE-SU-2026-0456-2 Urgent Xen Memory Leak Flaw Update

suse
Calendar Grey January 28, 2026
Dist Suse Esm H88
Update for SUSE fixes moderate issues: buffer overrun and vCPU isolation defects in xen. Apply patch for improved security.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for xen fixes the following issues: * CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing (XSA-477) (bsc#1256745) * CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation (XSA-479) (bsc#1256747)

Topics%20covered

Topics Covered

security advisory moderate buffer overrun OpenSUSE xen vcpu isolation

References

* bsc#1256745

* bsc#1256747

Cross-

* CVE-2025-58150

* CVE-2026-23553

CVSS scores:

* CVE-2025-58150 ( SUSE ): 4.8

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

* CVE-2025-58150 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-23553 ( SUSE ): 6.8

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

* CVE-2026-23553 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Products:

* openSUSE Leap 15.5

* SUSE Linux Enterprise Micro 5.5

An update that solves two vulnerabilities can now be installed.

##

* https://www.suse.com/security/cve/CVE-2025-58150.html

* https://www.suse.com/security/cve/CVE-2026-23553.html

* https://bugzilla.suse.com/show_bug.cgi?id=1256745

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0304-1
Release Date: 2026-01-27T16:14:51Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate buffer overrun OpenSUSE xen vcpu isolation

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