[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 Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Sep 12, 2025 | Sep 11, 2025 |
| Debian | — | Upgrade xen | Dec 4, 2025 | Dec 4, 2025 |
| Dell Powerstore Dsa2026115 | — | Upgrade Dell PowerStoreOS to the latest version | Feb 25, 2026 | Feb 24, 2026 |
| Suse | — | Upgrade xen-toolsUpgrade xen-libs-32bitUpgrade xenUpgrade xen-doc-htmlUpgrade xen-libsUpgrade xen-tools-xendomains-wait-diskUpgrade xen-develUpgrade xen-tools-domU | Dec 5, 2025 | Sep 11, 2025 |
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