CVE-2016-4020 Affecting qemu package, versions <1:2.5+dfsg-5ubuntu10.1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.06% (28th percentile)

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  • Snyk IDSNYK-UBUNTU1604-QEMU-427747
  • published25 May 2016
  • disclosed25 May 2016

Introduced: 25 May 2016

CVE-2016-4020  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 qemu to version 1:2.5+dfsg-5ubuntu10.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 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