CVE-2014-8481

Impact:
Important
Public Date:
2014-10-13
CWE:
CWE-476
Bugzilla:
1156615: CVE-2014-8480 CVE-2014-8481 kernel: kvm: NULL pointer dereference during rip relative instruction emulation

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2014-8481 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

These issues do not affect Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.

These issues do not affect kvm packages as shipped with Red Hat Enterprise Linux 5.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.1
Base Metrics AV:A/AC:L/Au:N/C:N/I:N/A:C
Access Vector Adjacent Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kvm Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank Nadav Amit and Andy Lutomirski for reporting this issue.
Last Modified

CVE description copyright © 2017, The MITRE Corporation