# SUSE-SU-2026:0012-1: xen security update

SUSE-SU-2026:0012-1, released January 5, 2026, fixes 6 CVEs in xen (version 4.18.5_08-150600.3.34.2). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-0012-1
- Platform: Linux
- Released: Jan 5, 2026
- Priority: Urgent (Closes CVE-2025-58142, rated Critical)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:0012-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [xen](https://patchblox.com/security/data/product/linux/xen.md) | opensuse-leap 15.6 | 4.18.5_08-150600.3.34.2 |
| [xen](https://patchblox.com/security/data/product/linux/xen.md) | sles 15.6 | 4.18.5_08-150600.3.34.2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-27466](https://patchblox.com/security/data/cve/CVE-2025-27466.md) | Urgent | xen: NULL pointer dereference in the Viridian interface when updating the reference TSC area (bsc#1248807). | 9.8 | 0.0049 |  |
| [CVE-2025-58142](https://patchblox.com/security/data/cve/CVE-2025-58142.md) | Urgent | xen: NULL pointer dereference in the Viridian interface due to assumption that the SIM page is mapped when | 9.8 | 0.0049 |  |
| [CVE-2025-58143](https://patchblox.com/security/data/cve/CVE-2025-58143.md) | Urgent | xen: information leak and reference counter underflow in the Viridian interface due to race in the mapping | 9.8 | 0.0038 |  |
| [CVE-2025-58149](https://patchblox.com/security/data/cve/CVE-2025-58149.md) | High | xen: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no | 7.5 | 0.0044 |  |
| [CVE-2025-58147](https://patchblox.com/security/data/cve/CVE-2025-58147.md) | High | xen: incorrect input sanitisation in Viridian hypercalls using the HV_VP_SET Sparse format can lead to | 7.5 | 0.0038 |  |
| [CVE-2025-58148](https://patchblox.com/security/data/cve/CVE-2025-58148.md) | High | xen: incorrect input sanitisation in Viridian hypercalls using any input format can lead to out-of-bounds | 7.5 | 0.0038 |  |

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Data as of 2026-11-11T01:43:54Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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