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Status published
Medium
CVE-2016-4020
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize...
Vulnerability 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).
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0
- https://bugzilla.redhat.com/show_bug.cgi?id=1313686
- https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html
- http://www.securityfocus.com/bid/86067
- https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
- https://access.redhat.com/errata/RHSA-2017:2392
- https://security.gentoo.org/glsa/201609-01
- http://www.ubuntu.com/usn/USN-2974-1
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://access.redhat.com/errata/RHSA-2017:2408
- https://access.redhat.com/errata/RHSA-2017:1856
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Affected Vendor
qemu
View all reports →Affected Software
qemu, ubuntu linux, debian linux, openstack, enterprise linux desktop, enterprise linux eus, enterprise linux server, enterprise linux server aus, enterprise linux server tus, enterprise linux workstation, virtualization
Vulnerable Versions:
0, 12.04, 14.04, 15.10, 16.04, 8.0, 6.0, 7.0, 8, 9, 10, 11, 7.4, 7.5, 7.6, 7.7, 4.0
Timeline
Official Publish:
May 25th, 2016
Last Modified:
August 6th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.