CVE-2016-4020

Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 25 May 2016, 15:00
Last modified:06 Aug 2024, 00:17

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.08% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 May 2016, 15:00
Published
Vulnerability first disclosed
06 Aug 2024, 00:17
Last Modified
Vulnerability information updated

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).

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.08%• Percentile: 25%

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 15.10 | 16.04

  • debian•debian_linux

    8.0

  • qemu•qemu

    ≤ 2.6.2

  • redhat•enterprise_linux_desktop

    7.0

  • redhat•enterprise_linux_eus

    7.4 | 7.5 | 7.6 | 7.7

  • redhat•enterprise_linux_server

    7.0

  • redhat•enterprise_linux_server_aus

    7.4 | 7.6 | 7.7

  • redhat•enterprise_linux_server_tus

    7.6 | 7.7

  • redhat•enterprise_linux_workstation

    7.0

  • redhat•openstack

    6.0 | 7.0 | 8 | 9 | 10 | 11

  • redhat•virtualization

    4.0

References (11)