Improper Handling of Exceptional Conditions Affecting xen package, versions <4.15.4-r0


0.0
medium

Snyk CVSS

    Attack Complexity High
    Scope Changed
    Availability High

    Threat Intelligence

    EPSS 0.05% (13th percentile)
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NVD
5.6 medium
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SUSE
5.3 medium

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  • Snyk ID SNYK-ALPINE314-XEN-3136179
  • published 20 Nov 2022
  • disclosed 11 Oct 2022

How to fix?

Upgrade Alpine:3.14 xen to version 4.15.4-r0 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:3.14 relevant fixed versions and status.

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.