CVE-2020-27672

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.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory xen.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://xenbits.xen.org/xsa/advisory-345.html patch vendor advisory
https://xenbits.xen.org/xsa/advisory-345.html patch vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html mailing list third party advisory vendor advisory
https://security.gentoo.org/glsa/202011-06 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ vendor advisory
https://www.debian.org/security/2020/dsa-4804 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2021/01/19/7 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-27672?
CVE-2020-27672 has been scored as a high severity vulnerability.
How to fix CVE-2020-27672?
To fix CVE-2020-27672, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-27672 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-27672 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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