CVE-2015-7972: Xen

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size when using the populate-on-demand (PoD) system, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors related to "heavy memory pressure."

Affected products

• Xen Xen: version 3.4.0 only; version 3.4.1 only; version 3.4.2 only; version 3.4.3 only; version 3.4.4 only; version 4.0.0 only; …

Published 2015-10-30. Last modified 2026-06-17.