CVE-2022-39422

Hypervisor code execution via PGMPhysRead buffer overflow

Published Oct 18, 2022 · Updated Sep 23, 2024

Out-of-bounds write in Oracle VM VirtualBox Core before 6.1.38 allows local users to execute code in the hypervisor context. PGMPhysRead fails to validate user-supplied data before processing it, permitting a write past the end of an allocated buffer. Exploitation requires high-privileged code execution in a guest and high complexity; success escapes that boundary and takes over the hypervisor.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Oracle VM VirtualBox Core before 6.1.38 allows local users to execute code in the hypervisor context. PGMPhysRead fails to validate user-supplied data before processing it, permitting a write past the end of an allocated buffer. Exploitation requires high-privileged code execution in a guest and high complexity; success escapes that boundary and takes over the hypervisor.

The record

CVE
CVE-2022-39422
Published
Oct 18, 2022
Updated
Sep 23, 2024
Vendor
Oracle Corporation
Product
Oracle VM VirtualBox
Classifications
CWE-269, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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=unspecified <6.1.38

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle Corporation · Oracle VM VirtualBoxversion=unspecified <6.1.38

Published CVSS scores

7.5OracleCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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