Buffer overflow in the kvm_vcpu_ioctl_x86_setup_mce function in arch/x86/kvm/x86.c in the…
Priority LOW 34CWE-119Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.00406 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | up to 2.6.31.14 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:-:*:*:*:*:*:* | 2.6.32 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc1:*:*:*:*:*:* | 2.6.32 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc2:*:*:*:*:*:* | 2.6.32 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc3:*:*:*:*:*:* | 2.6.32 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc4:*:*:*:*:*:* | 2.6.32 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc5:*:*:*:*:*:* | 2.6.32 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.32:rc6:*:*:*:*:*:* | 2.6.32 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 2.6.31.14 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:-:*:*:*:*:*:* Versions 2.6.32 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc1:*:*:*:*:*:* Versions 2.6.32 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc2:*:*:*:*:*:* Versions 2.6.32 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc3:*:*:*:*:*:* Versions 2.6.32 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc4:*:*:*:*:*:* Versions 2.6.32 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc5:*:*:*:*:*:* Versions 2.6.32 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.32:rc6:*:*:*:*:*:* Versions 2.6.32 rc6 Vulnerable ·Linux
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2009-4004
- 2026-10-03 Alias added: GHSA-xc28-j839-8wv2
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2009-4004 · CVE Program
- CVE-2009-4004 · NVD
- FIRST EPSS
- GHSA-xc28-j839-8wv2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences