CVE-2015-4163: Xen

Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days.

GNTTABOP_swap_grant_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.

Affected products

• Xen Xen: version 4.2.0 only; version 4.2.1 only; version 4.2.2 only; version 4.2.3 only; version 4.3.0 only; version 4.3.1 only; …

Published 2015-06-15. Last modified 2026-06-17.