CVE-2025-58142

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.

CVSS Metrics

• v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.04%• Percentile: 12%

Techniques & Countermeasures

• CWE-395•Use of NullPointerException Catch to Detect NULL Pointer Dereference

  Catching NullPointerException should not be used as an alternative to programmatic checks to prevent dereferencing a null pointer.

Affected Systems

• xen•xen

  ≥ 4.13.0, < 4.17.0

References (3)

• https://xenbits.xenproject.org/xsa/advisory-472.html
• http://xenbits.xen.org/xsa/advisory-472.html
• http://www.openwall.com/lists/oss-security/2025/09/09/1