SB2025090952 - Multiple vulnerabilities in Xen 

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Main Vulnerability Database SB2025090952

SB2025090952 - Multiple vulnerabilities in Xen

Published: September 9, 2025

Security Bulletin ID SB2025090952
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2025-27466)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when updating the reference TSC area. A malicious guest can perform a denial of service (DoS) attack against the hypervisor.



2) NULL pointer dereference (CVE-ID: CVE-2025-58142)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error by assuming the SIM page is mapped when a synthetic timer message has to be delivered. A malicious guest can perform a denial of service (DoS) attack against the hypervisor.


3) Race condition (CVE-ID: CVE-2025-58143)

The vulnerability allows a malicious guest to compromise the hypervisor.

The vulnerability exists due to a race condition in the mapping of the reference TSC page. A malicious guest can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.


Remediation

Install update from vendor's website.

References