CVE-2020-2732
MEDIUMCVSS 6.8/10EPSS 0.93%
Last modified
CVE-2020-2732 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.
Description
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.
Metrics
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/25/3Mailing List, Third Party Advisory
- https://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/25/3Mailing List, Third Party Advisory
- https://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-2732?
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.
How severe is CVE-2020-2732?
CVE-2020-2732 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.
How do I fix CVE-2020-2732?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-2732?
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Scan your code nowSource: NVD / NIST