CVE-2016-3157
HIGH severity · CVSS 7.8 · CWE-264
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://www.debian.org/security/2016/dsa-3607
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/84594
- http://www.securitytracker.com/id/1035308
- http://www.ubuntu.com/usn/USN-2968-1
- http://www.ubuntu.com/usn/USN-2968-2
- http://www.ubuntu.com/usn/USN-2969-1
- http://www.ubuntu.com/usn/USN-2970-1