What’s Vulnerable › Vulnerabilities

CVE-2009-4004

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-11-20 · updated 2026-06-16
• Weakness: CWE-119

Description

Buffer overflow in the kvm_vcpu_ioctl_x86_setup_mce function in arch/x86/kvm/x86.c in the KVM subsystem in the Linux kernel before 2.6.32-rc7 allows local users to cause a denial of service (memory corruption) or possibly gain privileges via a KVM_X86_SETUP_MCE IOCTL request that specifies a large number of Machine Check Exception (MCE) banks.

Affected products

• Linux kernel: through 2.6.31.14; 2.6.32, 2.6.32-rc1, 2.6.32-rc2, 2.6.32-rc3, 2.6.32-rc4, 2.6.32-rc5 (+1)

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9e38c3e01ad242fe2a625354cf065c34b01e3aa
• http://secunia.com/advisories/37357
• http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc7
• http://www.securityfocus.com/bid/37035
• http://www.vupen.com/english/advisories/2009/3267
• https://exchange.xforce.ibmcloud.com/vulnerabilities/54302
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9e38c3e01ad242fe2a625354cf065c34b01e3aa
• http://secunia.com/advisories/37357
• http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc7
• http://www.securityfocus.com/bid/37035
• http://www.vupen.com/english/advisories/2009/3267
• https://exchange.xforce.ibmcloud.com/vulnerabilities/54302

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