CVE-2022-26364 Affecting xen package, versions <4.16.2-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.12% (49th percentile)

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  • Snyk IDSNYK-DEBIAN13-XEN-5700442
  • published10 Jun 2022
  • disclosed9 Jun 2022

Introduced: 9 Jun 2022

CVE-2022-26364  (opens in a new tab)

How to fix?

Upgrade Debian:13 xen to version 4.16.2-1 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:13 relevant fixed versions and status.

x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.

CVSS Scores

version 3.1