Information Exposure Affecting xen package, versions <4.4.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-XEN-18388575
  • published29 Jul 2026
  • disclosed1 Oct 2013

Introduced: 1 Oct 2013

CVE-2013-4361  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Echo:latest xen to version 4.4.0-1 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct variable for the source effective address, which allows local HVM guests to obtain hypervisor stack information by reading the values used by the instruction.

CVSS Base Scores

version 3.1