CVE-2020-27672

high

Description

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

References

Advisories
More

https://www.debian.org/security/2020/dsa-4804

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

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/

http://www.openwall.com/lists/oss-security/2021/01/19/7

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

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

https://xenbits.xen.org/xsa/advisory-345.html

http://xenbits.xen.org/xsa/advisory-345.html

Details

Source: Mitre, NVD

Published: 2020-10-22

Updated: 2024-11-21

Risk Information

CVSS v2

Base Score: 6.9

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

Severity: Medium

CVSS v3

Base Score: 7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00065