CVE-2021-28039 Information

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.

CVSS Vector

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

Reference

http://xenbits.xen.org/xsa/advisory-369.html http://www.openwall.com/lists/oss-security/2021/03/05/2 https://security.netapp.com/advisory/ntap-20210409-0001/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5