UBUNTU-CVE-2016-3157
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.
02 / AFFECTED SOFTWARE
Affected packages
88 explicit affected versions
40 explicit affected versions
24 explicit affected versions
11 explicit affected versions
5 explicit affected versions
24 explicit affected versions
6 explicit affected versions
1 explicit affected versions
44 explicit affected versions
38 explicit affected versions
43 explicit affected versions
10 explicit affected versions
26 explicit affected versions
51 explicit affected versions
78 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
1 explicit affected versions
23 explicit affected versions
7 explicit affected versions
7 explicit affected versions
8 explicit affected versions
7 explicit affected versions
1 explicit affected versions
1 explicit affected versions
24 explicit affected versions
61 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- http://xenbits.xen.org/xsa/advisory-171.html
- http://xenbits.xen.org/xsa/xsa171.patch
- https://ubuntu.com/security/CVE-2016-3157
- https://ubuntu.com/security/notices/USN-2965-1
- https://ubuntu.com/security/notices/USN-2965-2
- https://ubuntu.com/security/notices/USN-2965-3
- https://ubuntu.com/security/notices/USN-2965-4
- https://ubuntu.com/security/notices/USN-2968-1
- https://ubuntu.com/security/notices/USN-2968-2
- https://ubuntu.com/security/notices/USN-2969-1
- https://ubuntu.com/security/notices/USN-2970-1
- https://ubuntu.com/security/notices/USN-2971-1
- https://ubuntu.com/security/notices/USN-2971-2
- https://ubuntu.com/security/notices/USN-2971-3
- https://ubuntu.com/security/notices/USN-2996-1
- https://ubuntu.com/security/notices/USN-2997-1
- https://www.cve.org/CVERecord?id=CVE-2016-3157