CVE-2016-9588

Kernel: kvm: nVMX: uncaught software exceptions in L1 guest leads to DoS

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

arch/x86/kvm/vmx.c in the Linux kernel through 4.9 mismanages the #BP and #OF exceptions, which allows guest OS users to cause a denial of service (guest OS crash) by declining to handle an exception thrown by an L2 guest.

arch/x86/kvm/vmx.c en el kernek de Linux hasta la versión 4.9 no gestiona adecuadamente las excepciones #BP y #OF, lo que permite a usuarios del SO invitados provocar una denegación de servicio (caída del SO invitado) declinando el manejo de una excepción lanzada por un invitado L2.

Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization(nVMX) feature enabled(nested=1), is vulnerable to an uncaught exception issue. It could occur if an L2 guest was to throw an exception which is not handled by an L1 guest.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-11-23 CVE Reserved
2016-12-28 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-248: Uncaught Exception
CWE-388: 7PK - Errors

CAPEC

References (11)

URL	Tag	Source
http://www.securityfocus.com/bid/94933	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ef85b67385436ddc1998f45f1d6a210f935b3388	2023-02-12
http://www.openwall.com/lists/oss-security/2016/12/15/3	2023-02-12
https://github.com/torvalds/linux/commit/ef85b67385436ddc1998f45f1d6a210f935b3388	2023-02-12

URL	Date	SRC
http://www.debian.org/security/2017/dsa-3804	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1842	2023-02-12
https://access.redhat.com/errata/RHSA-2017:2077	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1404924	2017-08-01
https://usn.ubuntu.com/3822-1	2023-02-12
https://usn.ubuntu.com/3822-2	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-9588	2017-08-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.9 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.9"		-		Affected