Xen vulnerabilities: known CVEs & security history
Xen Project · Virtualization · 15 tracked CVEs · 0 actively exploited · updated November 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Xen release lines — 15 in total. A CVE here doesn't mean your version is affected — check Xen's current status and the safe version to run.
Known Xen CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2025-58143 | critical | 9.8 | 0% | 2025 |
| CVE-2025-58142 | critical | 9.8 | 0% | 2025 |
| CVE-2025-27466 | critical | 9.8 | 0% | 2025 |
| CVE-2026-23558 | high | 7.8 | 0% | 2026 |
| CVE-2023-34319 | high | 7.8 | 0% | 2023 |
| CVE-2025-58149 | high | 7.5 | 0% | 2025 |
| CVE-2025-58148 | high | 7.5 | 0% | 2025 |
| CVE-2025-58147 | high | 7.5 | 0% | 2025 |
| CVE-2025-58145 | high | 7.5 | 0% | 2025 |
| CVE-2025-58144 | high | 7.5 | 0% | 2025 |
| CVE-2026-23557 | medium | 6.5 | 0% | 2026 |
| CVE-2022-23960 | medium | 5.6 | 0% | 2022 |
| CVE-2022-21166 | medium | 5.5 | 6% | 2022 |
| CVE-2022-21125 | medium | 5.5 | 6% | 2022 |
| CVE-2022-21123 | medium | 5.5 | 6% | 2022 |
Is my Xen version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Xen version → · Monitor Xen for new CVEs →
Xen vulnerabilities — frequently asked
How many known vulnerabilities does Xen have?
IsItPatched tracks 15 CVEs for Xen. 3 are critical-severity and 7 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Xen have any actively-exploited vulnerabilities?
None of Xen's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Xen vulnerability?
Among tracked issues, CVE-2025-58143 (CRITICAL, CVSS 9.8) ranks highest — a CWE-366 weakness.
Is Xen safe to use?
It depends on the version. The latest supported Xen release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Xen security status · Xen end-of-life · actively-exploited CVEs. Always verify against Xen Project's advisories — see our disclaimer.