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CVE-2020-27672

Good to know:

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Date: October 22, 2020

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.

Language: C

Severity Score

Related Resources (14)

http://xenbits.xen.org/xsa/advisory-345.html
https://security-tracker.debian.org/tracker/CVE-2020-27672
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
https://xenbits.xen.org/xsa/advisory-345.html
http://www.openwall.com/lists/oss-security/2021/01/19/7
https://www.debian.org/security/2020/dsa-4804
https://security.alpinelinux.org/vuln/CVE-2020-27672
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
https://security.gentoo.org/glsa/202011-06
https://nvd.nist.gov/vuln/detail/CVE-2020-27672
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27672
https://www.mend.io/vulnerability-database/CVE-2020-27672

Severity Score

Weakness Type (CWE)

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-362

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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