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.

Weaknesses 1

Affected Products 1

References 3

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

Remediation