Improper Handling of Exceptional Conditions Affecting xen package, versions <4.14.5+86-g1c354767d5-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-DEBIAN11-XEN-3042485
  • published12 Oct 2022
  • disclosed11 Oct 2022

Introduced: 11 Oct 2022

CVE-2022-33748  (opens in a new tab)
CWE-755  (opens in a new tab)

How to fix?

Upgrade Debian:11 xen to version 4.14.5+86-g1c354767d5-1 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.

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.

CVSS Scores

version 3.1