CVE-2025-27466: Mutiple vulnerabilities in the Viridian interface
[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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-27466?
CVE-2025-27466 has a severity rating that requires immediate attention due to potential exploitation risks.
How do I fix CVE-2025-27466?
To fix CVE-2025-27466, update the affected Xen Viridian interface to the latest security patch provided by the vendor.
What versions of software are affected by CVE-2025-27466?
CVE-2025-27466 affects the Xen Viridian interface, specifically versions that utilize flawed memory handling routines.
What types of vulnerabilities does CVE-2025-27466 include?
CVE-2025-27466 includes issues such as NULL pointer dereference and improper handling of guest memory pages.
Is there a workaround for CVE-2025-27466 while waiting for a patch?
Currently, no viable workaround has been documented for CVE-2025-27466, so applying the patch is essential.