CVE-2016-4020

6.5 MEDIUM
Published: May 25, 2016 Modified: May 06, 2026
View on NVD

Description

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).

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.securityfocus.com/bid/86067
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2974-1
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1856
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2392
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2408
Source: secalert@redhat.com
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1313686
Source: secalert@redhat.com
Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
Source: secalert@redhat.com
Mailing List Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html
Source: secalert@redhat.com
Patch Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
Source: secalert@redhat.com
Patch Third Party Advisory
https://security.gentoo.org/glsa/201609-01
Source: secalert@redhat.com
Third Party Advisory
http://www.securityfocus.com/bid/86067
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2974-1
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1856
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2392
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2408
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1313686
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://security.gentoo.org/glsa/201609-01
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

22 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
0.1%
24th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

canonical qemu debian redhat