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openSUSE Leap 15.3 SUSE-SU-2026-1645-1 Xen Important DoS Issues

suse
Calendar Grey April 28, 2026
Dist Suse Esm H88
Install important SUSE update for xen addressing three security issues with reboot instructions included.
An update that solves three vulnerabilities can now be installed.

Summary

## 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).

Topics%20covered

Topics Covered

security advisory remote access DoS important OpenSUSE xen

References

* bsc#1262178

* bsc#1262180

* bsc#1262428

Cross-

* CVE-2025-54505

* CVE-2026-23557

* CVE-2026-23558

CVSS scores:

* CVE-2025-54505 ( SUSE ): 6.9

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

* CVE-2025-54505 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

* CVE-2025-54505 ( NVD ): 2.0

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-23557 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

* CVE-2026-23558 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected Products:

* openSUSE Leap 15.3

* SUSE Linux Enterprise Micro 5.2

* SUSE Linux Enterprise Micro for Rancher 5.2

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1645-1
Release Date: 2026-04-28T14:46:53Z
Rating: important

Topics%20covered

Topics Covered

security advisory remote access DoS important OpenSUSE xen

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