CVE-2016-3157
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
28.1%
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Affected configurations
References
www.debian.org/security/2016/dsa-3607
www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securityfocus.com/bid/84594
www.securitytracker.com/id/1035308
www.ubuntu.com/usn/USN-2968-1
www.ubuntu.com/usn/USN-2968-2
www.ubuntu.com/usn/USN-2969-1
www.ubuntu.com/usn/USN-2970-1
www.ubuntu.com/usn/USN-2971-1
www.ubuntu.com/usn/USN-2971-2
www.ubuntu.com/usn/USN-2971-3
www.ubuntu.com/usn/USN-2996-1
www.ubuntu.com/usn/USN-2997-1
xenbits.xen.org/xsa/advisory-171.html
Related
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
28.1%