Allocation of Resources Without Limits or Throttling Affecting xen package, versions <4.14.5+94-ge49571868d-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-DEBIAN11-XEN-3367389
  • published22 Mar 2023
  • disclosed21 Mar 2023

Introduced: 21 Mar 2023

CVE-2022-42334  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:11 xen to version 4.14.5+94-ge49571868d-1 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 Debian. See How to fix? for Debian:11 relevant fixed versions and status.

x86/HVM pinned cache attributes mis-handling T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To allow cachability control for HVM guests with passed through devices, an interface exists to explicitly override defaults which would otherwise be put in place. While not exposed to the affected guests themselves, the interface specifically exists for domains controlling such guests. This interface may therefore be used by not fully privileged entities, e.g. qemu running deprivileged in Dom0 or qemu running in a so called stub-domain. With this exposure it is an issue that - the number of the such controlled regions was unbounded (CVE-2022-42333), - installation and removal of such regions was not properly serialized (CVE-2022-42334).

CVSS Scores

version 3.1