CVE-2009-4031

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Summary

CVECVE-2009-4031
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2009-11-29 13:07:32 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionThe do_insn_fetch function in arch/x86/kvm/emulate.c in the x86 emulator in the KVM subsystem in the Linux kernel before 2.6.32-rc8-next-20091125 tries to interpret instructions that contain too many bytes to be valid, which allows guest OS users to cause a denial of service (increased scheduling latency) on the host OS via unspecified manipulations related to SMP support.

Risk And Classification

Primary CVSS: v2.0 7.8 from [email protected]

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

Problem Types: CWE-20 | n/a

CVSS v2.0 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 2.6.32 - All All
Operating System Linux Linux Kernel 2.6.32 rc1 All All
Operating System Linux Linux Kernel 2.6.32 rc2 All All
Operating System Linux Linux Kernel 2.6.32 rc3 All All
Operating System Linux Linux Kernel 2.6.32 rc4 All All
Operating System Linux Linux Kernel 2.6.32 rc5 All All
Operating System Linux Linux Kernel 2.6.32 rc6 All All
Operating System Linux Linux Kernel 2.6.32 rc7 All All

Vendor Declared Affected Products

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

References

ReferenceSourceLinkTags
[security-announce] SUSE Security Announcement: Linux kernel (SUSE-SA:20 af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
Repository / Oval Repository af854a3a-2127-422b-91ae-364da2661108 oval.cisecurity.org Third Party Advisory
Bug 541160 – CVE-2009-4031 kernel: KVM: x86 emulator: limit instructions to 15 bytes af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
Fedora update for kernel - Secunia Advisories - Vulnerability Information - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Third Party Advisory
[SECURITY] Fedora 10 Update: kernel-2.6.27.41-170.2.117.fc10 af854a3a-2127-422b-91ae-364da2661108 www.redhat.com Third Party Advisory
404: File not found af854a3a-2127-422b-91ae-364da2661108 www.kernel.org Patch, Vendor Advisory
Linux Kernel KVM Large SMP Instruction Local Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
git.kernel.org af854a3a-2127-422b-91ae-364da2661108 git.kernel.org
oss-security - Re: CVE request: kernel: KVM: x86 emulator: limit instructions to 15 bytes af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
oss-security - CVE request: kernel: KVM: x86 emulator: limit instructions to 15 bytes af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
kernel/git/avi/kvm.git - Unnamed repository; edit this file 'description' to name the repository. 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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