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


0.0
medium

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Availability High

    Threat Intelligence

    EPSS 0.06% (24th percentile)
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NVD
6.5 medium

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  • Snyk ID SNYK-ALPINE315-XEN-1928634
  • published 25 Nov 2021
  • disclosed 5 Jan 2018

How to fix?

Upgrade Alpine:3.15 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:3.15 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.