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DEBIAN-CVE-2021-28039

DEBIAN-CVE-2021-28039 PUBLISHED CVSS 6.5 MEDIUM

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.

Risk Scores

CVSS 3.1
6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected Products

VendorProductVersions
Debian:12linux0, 0, 0
Debian:11linux0, 0, 0
Debian:14linux0, 0, 0
Debian:13linux0, 0, 0

Timeline

  • Mar 5, 2021 CVE Published
  • Apr 28, 2026 CVE Updated
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