National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2016-8630 Detail

Description

The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.

Source:  MITRE
Description Last Modified:  11/27/2016

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.5 MEDIUM
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.8

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 4.9 MEDIUM
Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.9

Access Vector (AV): Local
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e Issue Tracking Patch Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7 Release Notes
http://www.openwall.com/lists/oss-security/2016/11/22/3 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/94459
https://bugzilla.redhat.com/show_bug.cgi?id=1393350 Issue Tracking
https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937e Issue Tracking Patch Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)
  • NULL Pointer Dereference (CWE-476)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
4.8.6


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-8630
NVD Published Date:
11/27/2016
NVD Last Modified:
01/04/2018