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CVE-2009-4031

N/A
Published: November 27, 2009 at 07:00 PM UTC
Updated: June 16, 2026 at 11:12 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 3%

Description

The 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
v < 2.6.322.6.322.6.32 rc12.6.32 rc22.6.32 rc32.6.32 rc42.6.32 rc52.6.32 rc62.6.32 rc7
Affected range stops below 2.6.32, so it looks safe — our inference, not a vendor statement

References (10)

x_refsource_CONFIRM
Source: [email protected]
http://git.kernel.org/?p=linux/kernel/git/avi/kvm.git%3Ba=commit%3Bh=e42d9b8141d1f54ff72ad3850bb110c95a5f3b88
Vendor Advisoryx_refsource_SUSEThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00006.html
Third Party Advisoryx_refsource_SECUNIA
Source: [email protected]
http://secunia.com/advisories/37720
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
http://www.kernel.org/pub/linux/kernel/v2.6/next/patch-v2.6.32-rc8-next-20091125.gz
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2009/11/25/1
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2009/11/25/3
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/37130
x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=541160

CVSS

7.8HIGH[email protected]
Confidentiality
NONE
Integrity
NONE
Availability
COMPLETE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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