Access Restriction Bypass Affecting xen package, versions <4.1.3-1


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.64% (46th percentile)

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  • Snyk IDSNYK-ECHOLATEST-XEN-18388522
  • published29 Jul 2026
  • disclosed3 Dec 2012

Introduced: 3 Dec 2012

CVE-2012-3432  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Echo:latest xen to version 4.1.3-1 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 handle_mmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service (guest OS crash) via unspecified operations on MMIO regions.

CVSS Base Scores

version 3.1