Vulnerability · Published Sep 11, 2025 · Assigned by XEN
CVE-2025-27466Mutiple vulnerabilities in the Viridian interface
Critical 9.8
In plain English
A critical-severity security flaw in Xen from Xen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.18.5-r2 | ALPINE-CVE-2025-27466 |
| Alpine:v3.21 | xen | 4.19.3-r1 | ALPINE-CVE-2025-27466 |
| Alpine:v3.22 | xen | 4.20.1-r1 | ALPINE-CVE-2025-27466 |
| Alpine:v3.23 | xen | 4.20.1-r1 | ALPINE-CVE-2025-27466 |
| Alpine:v3.24 | xen | 4.20.1-r1 | ALPINE-CVE-2025-27466 |
| Debian:12 | xen | 4.17.5+72-g01140da4e8-1 | DSA-6068-1 |
| Debian:12 | xen | 4.17.5+72-g01140da4e8-1 | DEBIAN-CVE-2025-27466 |
| Debian:13 | xen | 4.20.2+7-g1badcf5035-0+deb13u1 | DEBIAN-CVE-2025-27466 |
| Debian:13 | xen | 4.20.2+7-g1badcf5035-0+deb13u1 | DSA-6068-1 |
| Debian:14 | xen | 4.20.2+7-g1badcf5035-1 | DEBIAN-CVE-2025-27466 |
| Ubuntu:22.04:LTS | xen | no fix listed | UBUNTU-CVE-2025-27466 |
| Ubuntu:24.04:LTS | xen | no fix listed | UBUNTU-CVE-2025-27466 |
| Ubuntu:25.10 | xen | no fix listed | UBUNTU-CVE-2025-27466 |
| Ubuntu:26.04:LTS | xen | no fix listed | UBUNTU-CVE-2025-27466 |
| Ubuntu:26.10 | xen | no fix listed | UBUNTU-CVE-2025-27466 |
Affected products (as reported)
Weakness: CWE-395 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H