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CVE-2016-4020 Affecting qemu package, versions <1:2.6+dfsg-2

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Confidentiality High

    Threat Intelligence

    EPSS 0.06% (24th percentile)
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NVD
6.5 medium
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Red Hat
3.4 low

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  • Snyk ID SNYK-DEBIAN10-QEMU-427744
  • published 25 May 2016
  • disclosed 25 May 2016
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Introduced: 25 May 2016

CVE-2016-4020 Open this link in a new tab

How to fix?

Upgrade Debian:10 qemu to version 1:2.6+dfsg-2 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 Debian. See How to fix? for Debian:10 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).

References