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Incomplete Cleanup Affecting xen package, versions <4.15.2-r0

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.08% (35th percentile)
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NVD
4.6 medium
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SUSE
6.5 medium

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  • Snyk ID SNYK-ALPINE314-XEN-2766325
  • published 16 Apr 2022
  • disclosed 25 Jan 2022
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Introduced: 25 Jan 2022

CVE-2022-23035 Open this link in a new tab
CWE-459 Open this link in a new tab

How to fix?

Upgrade Alpine:3.14 xen to version 4.15.2-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.

Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid.