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Race Condition Affecting xen package, versions <4.14.0-r2

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.05% (14th percentile)
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NVD
7 high
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SUSE
7.8 high

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  • Snyk ID SNYK-ALPINE315-XEN-1928757
  • published 21 Jan 2021
  • disclosed 22 Oct 2020
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Introduced: 22 Oct 2020

CVE-2020-27672 Open this link in a new tab
CWE-362 Open this link in a new tab

How to fix?

Upgrade Alpine:3.15 xen to version 4.14.0-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.15 relevant fixed versions and status.

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.