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CVE-2016-4020

nvd nist
Published: May 25, 2016Modified: May 6, 2026

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6.5
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Exploitability: 2.0 / Impact: 4.0
Source: 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).

Affected (25)

Products: Qemu: Qemu · Canonical: Ubuntu Linux · Debian: Debian Linux · +1 more
Show all products
Qemu: Qemu · Canonical: Ubuntu Linux · Debian: Debian Linux · Redhat: Enterprise Linux Desktop, Enterprise Linux Eus, Enterprise Linux Server, Enterprise Linux Server Aus, Enterprise Linux Server Tus, Enterprise Linux Workstation, Openstack, Virtualization
Qemu
1 product
Qemu
Canonical
1 product
Ubuntu Linux
Debian
1 product
Debian Linux
Redhat
8 products
Enterprise Linux Desktop
Enterprise Linux Eus
Enterprise Linux Server
Enterprise Linux Server Aus
Enterprise Linux Server Tus
Enterprise Linux Workstation
Openstack
Virtualization
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Qemu
Up to 2.6.2
Configuration B
4 vulnerable
Vulnerable SoftwareAffected Versions
Canonical
Ubuntu Linux
Version 12.04
Ubuntu Linux
Version 14.04
Ubuntu Linux
Version 15.10
Ubuntu Linux
Version 16.04
Configuration C
1 vulnerable
Vulnerable SoftwareAffected Versions
Debian Linux
Version 8.0
Configuration D
18 vulnerable
Vulnerable SoftwareAffected Versions
Enterprise Linux Desktop
Version 7.0
Redhat
Enterprise Linux Eus
Version 7.4
Enterprise Linux Eus
Version 7.5
Enterprise Linux Eus
Version 7.6
Enterprise Linux Eus
Version 7.7
Enterprise Linux Server
Version 7.0
Redhat
Enterprise Linux Server Aus
Version 7.4
Enterprise Linux Server Aus
Version 7.6
Enterprise Linux Server Aus
Version 7.7
Redhat
Enterprise Linux Server Tus
Version 7.6
Enterprise Linux Server Tus
Version 7.7
Enterprise Linux Workstation
Version 7.0
Redhat
Openstack
Version 10
Openstack
Version 11
Openstack
Version 6.0
Openstack
Version 7.0
Openstack
Version 8
Openstack
Version 9
Configuration E
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Virtualization
Version 4.0
Running on/withPlatform Versions
Redhat
Enterprise Linux
Version 7.0

References (22)

Source: secalert@redhat.com
Source: secalert@redhat.com
Third Party AdvisoryVDB Entry
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Issue TrackingThird Party Advisory
Source: secalert@redhat.com
Mailing ListThird Party Advisory
Source: secalert@redhat.com
PatchThird Party Advisory
Source: secalert@redhat.com
PatchThird Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party AdvisoryVDB Entry
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.