CVE-2020-2732

L1 information disclosure via incomplete VMX intercept checks

Published Apr 8, 2020 · Updated Sep 30, 2024

Information exposure in KVM on Oracle Linux 6 and 7 allows guest OS users to read sensitive L1 resources through an L2 guest. The Intel VMX instruction-emulation path does not fully enforce L1-configured I/O, MSR, and descriptor-table intercepts before L0 emulates an L2 instruction. Guest OS users need control of an L2 guest on an Intel host with nested virtualization enabled; the reported consequence is L1 information disclosure.

CVSS severity6.8
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in KVM on Oracle Linux 6 and 7 allows guest OS users to read sensitive L1 resources through an L2 guest. The Intel VMX instruction-emulation path does not fully enforce L1-configured I/O, MSR, and descriptor-table intercepts before L0 emulates an L2 instruction. Guest OS users need control of an L2 guest on an Intel host with nested virtualization enabled; the reported consequence is L1 information disclosure.

The record

CVE
CVE-2020-2732
Published
Apr 8, 2020
Updated
Sep 30, 2024
Vendor
Oracle
Product
Oracle Linux
Classifications
CWE-200
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6
  2. Affected versionversion=7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Oracle · Oracle Linuxversion=6; version=7

Published CVSS scores

6.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.8OracleCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
2.3NIST NVDAV:A/AC:M/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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