Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | 4.0.0 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- http://www.debian.org/security/2016/dsa-3607
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.h
- 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
- http://www.ubuntu.com/usn/USN-2971-1
- http://www.ubuntu.com/usn/USN-2971-2
- http://www.ubuntu.com/usn/USN-2971-3
- http://www.ubuntu.com/usn/USN-2996-1
- http://www.ubuntu.com/usn/USN-2997-1
- http://xenbits.xen.org/xsa/advisory-171.htmlPatchVendor Advisory
- http://www.debian.org/security/2016/dsa-3607
FAQ
What is CVE-2016-3157?
CVE-2016-3157 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 ...
How severe is CVE-2016-3157?
CVE-2016-3157 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-3157?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Canonical Ubuntu Linux.