Out-of-Bounds Affecting xen package, versions <4.10.0-r1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-ALPINE316-XEN-2844878
  • published25 Nov 2021
  • disclosed5 Jan 2018

Introduced: 5 Jan 2018

CVE-2018-5244  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Alpine:3.16 xen to version 4.10.0-r1 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:3.16 relevant fixed versions and status.

In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.