CVE-2021-28039

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness enumeration

CWE-131

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.openwall.com/lists/oss-security/2021/03/05/2Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-369.htmlPatch, Vendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2
https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/05/2Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-369.htmlPatch, Vendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2
https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory

Timeline

Published: Mar 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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