VDB
DEBIAN-CVE-2025-27466
DEBIAN-CVE-2025-27466
PUBLISHED
CVSS 9.800000190734863 CRITICAL
[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.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | xen | 0, 4.20.0+68-g35cb38b222-1, 0 |
| Debian:12 | xen | 0, 4.17.1+2-gb773c48e36-1, 4.17.2+55-g0b56bed864-1 |
| Debian:14 | xen | 0, 4.20.0+68-g35cb38b222-1, 0 |
| Debian:11 | xen | 4.14.2+25-gb6a8c4f72d-2, 4.14.3+32-g9de3671772-1, 4.14.3+32-g9de3671772-1~deb11u1 |
Timeline
- Sep 11, 2025 CVE Published
- Apr 28, 2026 CVE Updated