Information Exposure Affecting qemu-kvm package, versions <10:1.5.3-141.el7


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-CENTOS7-QEMUKVM-2086386
  • published26 Jul 2021
  • disclosed7 Apr 2016

Introduced: 7 Apr 2016

CVE-2016-4020  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Centos:7 qemu-kvm to version 10:1.5.3-141.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm package and not the qemu-kvm package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).

CVSS Scores

version 3.1