CVEvulnerability

CVE-2016-4020

6.5 MEDIUM Published 2016-05-25 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2016-05-25
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS 2.0 ([email protected])
2.1 LOW — AV:L/AC:L/Au:N/C:P/I:N/A:N

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 configurations

• qemu qemu (<= 2.6.2) • canonical ubuntu linux 12.04 • canonical ubuntu linux 14.04 • canonical ubuntu linux 15.10 • canonical ubuntu linux 16.04 • debian debian linux 8.0 • redhat openstack 6.0 • redhat openstack 7.0 • redhat openstack 8 • redhat openstack 9 • redhat openstack 10 • redhat openstack 11 • redhat enterprise linux desktop 7.0 • redhat enterprise linux eus 7.4 • redhat enterprise linux eus 7.5 • redhat enterprise linux eus 7.6 • redhat enterprise linux eus 7.7 • redhat enterprise linux server 7.0 • redhat enterprise linux server aus 7.4 • redhat enterprise linux server aus 7.6 • redhat enterprise linux server aus 7.7 • redhat enterprise linux server tus 7.6 • redhat enterprise linux server tus 7.7 • redhat enterprise linux workstation 7.0 • redhat virtualization 4.0

References