High severity · published Apr 12, 2016
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…
7.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UL
Ubuntu Linux · Canonical
12.04 · source: NVD
XE
Xen · Xen
4.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-3157
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-3157
www.debian.org
http://www.debian.org/security/2016/dsa-3607
www.oracle.com
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securityfocus.com
http://www.securityfocus.com/bid/84594
www.securitytracker.com
http://www.securitytracker.com/id/1035308
www.ubuntu.com
http://www.ubuntu.com/usn/USN-2968-1
www.ubuntu.com
http://www.ubuntu.com/usn/USN-2968-2
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