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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://www.ubuntu.com/usn/USN-2971-2 ↗
- http://xenbits.xen.org/xsa/advisory-171.html ↗
- http://www.ubuntu.com/usn/USN-2970-1 ↗
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html ↗
- http://www.ubuntu.com/usn/USN-2969-1 ↗
- http://www.ubuntu.com/usn/USN-2968-1 ↗
- http://www.ubuntu.com/usn/USN-2971-3 ↗
- http://www.ubuntu.com/usn/USN-2997-1 ↗
- http://www.debian.org/security/2016/dsa-3607 ↗
- http://www.ubuntu.com/usn/USN-2971-1 ↗
- http://www.ubuntu.com/usn/USN-2996-1 ↗
- http://www.ubuntu.com/usn/USN-2968-2 ↗
- http://www.securitytracker.com/id/1035308 ↗
- http://www.securityfocus.com/bid/84594 ↗