National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2014-8481 Detail

Description

The instruction decoder in arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel before 3.18-rc2 does not properly handle invalid instructions, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) via a crafted application that triggers (1) an improperly fetched instruction or (2) an instruction that occupies too many bytes. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8480.

Source:  MITRE
Description Last Modified:  11/10/2014

Impact

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): Low
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/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a430c9166312e1aa3d80bce32374233bdbfeba32 Exploit
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/128427
http://www.openwall.com/lists/oss-security/2014/10/23/7 Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1156615
https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32 Exploit

Technical Details

Vulnerability Type (View All)

  • Resource Management Errors (CWE-399)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
3.18


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2014-8481
NVD Published Date:
11/10/2014
NVD Last Modified:
11/20/2015