6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
24.1%
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).
www.openwall.com/lists/oss-security/2016/04/13/6
launchpad.net/bugs/cve/CVE-2016-4020
lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
nvd.nist.gov/vuln/detail/CVE-2016-4020
security-tracker.debian.org/tracker/CVE-2016-4020
ubuntu.com/security/notices/USN-2974-1
www.cve.org/CVERecord?id=CVE-2016-4020
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
24.1%