CVE-2014-8481

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Summary

CVECVE-2014-8481
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2014-11-10 11:55:09 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 4.9 from [email protected]

AV:L/AC:L/Au:N/C:N/I:N/A:C

Problem Types: CWE-399 | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:L/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All rc1 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
KVM: emulate: avoid accessing NULL ctxt->memopp · torvalds/linux@a430c91 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org
Security Advisory SA62042 - Linux Kernel KVM Instruction Decoding Failure Handling Denial of Service Vulnerability - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
oss-security - CVE Request: Linux 3.17 guest-triggerable KVM OOPS af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Exploit
thread.gmane.org | 522: Connection timed out af854a3a-2127-422b-91ae-364da2661108 thread.gmane.org
Bug 1156615 – CVE-2014-8480 CVE-2014-8481 kernel: kvm: NULL pointer dereference during rip relative instruction emulation af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
kernel/git/torvalds/linux.git - Linux kernel source tree MITRE git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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