CVE-2017-15597: Xen

Critical severity, CVSS 9.1. EPSS: 2.8% chance of exploitation in the next 30 days.

An issue was discovered in Xen through 4.9.x. Grant copying code made an implication that any grant pin would be accompanied by a suitable page reference. Other portions of code, however, did not match up with that assumption. When such a grant copy operation is being done on a grant of a dying domain, the assumption turns out wrong. A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service. Privilege escalation and information leaks cannot be ruled out.

Affected products

• Xen Xen: up to and including 4.9.0

Published 2017-10-30. Last modified 2026-06-17.