CVE-2025-27466

CriticalCVSS 9.8/10Last modified Oct 19, 2026

Description

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

There are multiple issues related to the handling and accessing of guest memory pages in the viridian code:

1. A NULL pointer dereference in the updating of the reference TSC area. This is CVE-2025-27466.

2. A NULL pointer dereference by assuming the SIM page is mapped when a synthetic timer message has to be delivered. This is CVE-2025-58142.

3. A race in the mapping of the reference TSC page, where a guest can get Xen to free a page while still present in the guest physical to machine (p2m) page tables. This is CVE-2025-58143.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-395

Affected software

No affected versions have been published.

Timeline

Published
Sep 11, 2025
Last modified
Oct 19, 2026
NVD status
Modified

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CVE-2025-27466: Critical severity, CVSS 9.8 | Vulnix