SB2025091143 - SUSE update for xen

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

• https://www.suse.com/support/update/announcement/2025/suse-su-202503172-1/