CVE-2020-27673

medium

Description

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.

References

Advisories
More

https://xenbits.xen.org/xsa/advisory-332.html

https://security.gentoo.org/glsa/202011-06

https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html

https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html

https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070

http://www.openwall.com/lists/oss-security/2021/01/19/6

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e99502f76271d6bc4e374fe368c50c67a1fd3070

https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-20177

Details

Source: Mitre, NVD

Published: 2020-10-22

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

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