Improper Resource Shutdown or Release Affecting xen package, versions <4.16.3-r0


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-ALPINE316-XEN-3183837
  • published20 Nov 2022
  • disclosed11 Oct 2022

Introduced: 11 Oct 2022

CVE-2022-33747  (opens in a new tab)
CWE-404  (opens in a new tab)

How to fix?

Upgrade Alpine:3.16 xen to version 4.16.3-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:3.16 relevant fixed versions and status.

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

CVSS Scores

version 3.1