QEMU is widely used in virtualization and cloud; this VM escape lets guests read/write host files and run code, risking broad infrastructure compromise.
CVE-2026-93834
QEMU 9pfs race allows VM escape to host file read/write and code execution.
Is CVE-2026-93834 being exploited?
Not confirmed. CVE-2026-93834 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.
How severe is CVE-2026-93834?
CVE-2026-93834 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-2026-93834?
Yes. A fix has been recorded for CVE-2026-93834. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-93834 affect?
CVE-2026-93834 affects QEMU (9pfs subsystem), VMs using 9p/shared folders (9pfs), KVM/QEMU deployments and cloud hosts. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-93834?
Apply vendor QEMU patches immediately; disable/restrict 9pfs; isolate untrusted guests
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Malicious guest exploits 9pfs race to escape VM, read/write host files and execute code as the QEMU process user.
Immediate action required