CVE-2021-28039

MEDIUM

Linux Kernel 5.9.0-5.11.3 - Denial of Service via Guest Physical Address Misuse

Title source: llm

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.

References (4)

Core 4

Core References

Mailing List, Patch, Third Party Advisory mailing-list

http://www.openwall.com/lists/oss-security/2021/03/05/2

Patch, Vendor Advisory

http://xenbits.xen.org/xsa/advisory-369.html

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210409-0001/

Patch

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2

Scores

CVSS v3 6.5

EPSS 0.0042

EPSS Percentile 33.7%

Attack Vector LOCAL

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

Details

CWE

CWE-131

Status published

Products (4)

linux/linux_kernel 5.9.0 - 5.11.3

netapp/cloud_backup

netapp/solidfire_baseboard_management_controller_firmware

xen/xen

Published Mar 05, 2021

Tracked Since Feb 18, 2026