VULNERABILITY INTELLIGENCE

CVE-2021-28039

CVSS score6.5 MEDIUM
EPSS probability0.42%
CISA KEVNot currently listed
Published2021-03-05
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Description

An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.

Weakness classification

  • nvd@nist.gov: CWE-131

Primary references