CVE-2009-1242
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in...
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
Exploit likelihood
What each source reports
NVD Score used
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
- Record
CVE-2009-1242- CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
- Record
CVE-2009-1242- Updated
- 2026-11-02
EUVDEUVD-2009-1241 No score
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
- Record
EUVD-2009-1241- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wqvc-c395-66j7 No score
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in...
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
- Record
GHSA-wqvc-c395-66j7- Weakness
- CWE-20
- Updated
- 2026-11-02
OSVBELL-CVE-2009-1242
CVE-2009-1242 does not affect BellSoft software
- Record
BELL-CVE-2009-1242- CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linux-2.6.24Debian:4.0 From an advisory covering 24 CVEs |
before 2.6.24-6~etchnhalf.8etch1, plus listed versions 2.6.24-5~etchnhalf.12.6.24-6~etchnhalf.12.6.24-6~etchnhalf.22.6.24-6~etchnhalf.32.6.24-6~etchnhalf.4 Show 4 moreShow less2.6.24-6~etchnhalf.52.6.24-6~etchnhalf.62.6.24-6~etchnhalf.72.6.24-6~etchnhalf.8 |
2.6.24-6~etchnhalf.8etch1 |
linux-2.6Debian:5.0 From an advisory covering 13 CVEs |
before 2.6.26-15lenny2, plus listed versions 2.6.26-132.6.26-13lenny22.6.26-13lenny2~bpo40+12.6.26-142.6.26-152.6.26-15lenny12.6.26-15~bpo40+12.6.26-15~bpo40+2 |
2.6.26-15lenny2 |
user-mode-linuxDebian:5.0 From an advisory covering 13 CVEs |
before 2.6.26-1um-2+15lenny2, plus listed versions 2.6.26-1um-22.6.26-1um-2+15 |
2.6.26-1um-2+15lenny2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-1242 is a medium vulnerability (CVSS 4.9) in Debian Linux, published April 6, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 41st percentile. No source names a fixed version.
References
kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.29-git1.log
globalsecuritymag.com/Vigil-nce-Linux-kernel-denial-of%2C20090402%2C8311
exchange.xforce.ibmcloud.com/vulnerabilities/49594
secunia.com/advisories/35226
patchwork.kernel.org/patch/15549
Show 26 moreShow less
securityfocus.com/bid/34331
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=16175a796d061833aacfbd9672235f2d2725df65
redhat.com/archives/fedora-package-announce/2009-May/msg01126.html
lists.opensuse.org/opensuse-security-announce/2009-06/msg00002.html
vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-EFER-8585
ubuntu.com/usn/usn-793-1
debian.org/security/2009/dsa-1800
wiki.rpath.com/Advisories:rPSA-2009-0084
openwall.com/lists/oss-security/2009/04/01/3
vupen.com/english/advisories/2009/0924
bugzilla.redhat.com/show_bug.cgi?id=502109
nvd.nist.gov/vuln/detail/CVE-2009-1242
github.com/advisories/GHSA-wqvc-c395-66j7
docs.bell-sw.com/security/cves/CVE-2009-1242