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SUSE 2026 1743-1 Xen Important Security Fix DoS CVE-2025-54505

suse
Calendar Grey May 7, 2026
Dist Suse Esm H88
Critical update for SUSE Xen addressing three security issues including potential DoS vulnerabilities.
An update that solves three vulnerabilities, contains one feature and has one security fix can now be installed.

Summary

## This update for xen fixes the following issues: * Update to Xen 4.20.3 bug fix release (bsc#1027519) (jsc#PED-8907). * 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 denial of service SuSE important system update xen

References

* bsc#1027519

* bsc#1262178

* bsc#1262180

* bsc#1262428

* jsc#PED-8907

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 ): 7.3

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1743-1
Release Date: 2026-05-07T07:15:57Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE important system update xen

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