CVE-2026-62427
Xen platform-op permission bypass lets unprivileged domains perform unauthorized platform operations.
Is CVE-2026-62427 being exploited?
Not confirmed. CVE-2026-62427 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-62427?
CVE-2026-62427 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-62427?
Yes. A fix has been recorded for CVE-2026-62427. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-62427 affect?
CVE-2026-62427 affects Xen hypervisor, dom0 (control domain), Xenstore domains, Hosts using XSM/Flask policy. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-62427?
Apply vendor patch when available; restrict Xenstore and untrusted guests; monitor host logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unprivileged Xenstore or guest domains can bypass permission checks to execute platform operations, enabling privilege escalation to control domain or unauthorized host management.
Patch when possible
- affectedconsult Xen advisory XSA-499
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.