CVE-2022-22938Public exploit

Service crash via signed font offset

Published Jan 28, 2022 · Updated Aug 3, 2024

Denial of service in VMware Workstation 16.x before 16.2.2 and Horizon Client for Windows 5.x before 5.5.3 allows attackers to crash ThinPrint. TPView.dll accepts a negative FileEndOffs value from an EMFSPOOL font record, passes a signed bounds check, and uses it as the size for realloc. Access to a virtual machine or remote desktop and enabled virtual printing are required; the service runs on the Windows host.

CVSS severity4.0
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in VMware Workstation 16.x before 16.2.2 and Horizon Client for Windows 5.x before 5.5.3 allows attackers to crash ThinPrint. TPView.dll accepts a negative FileEndOffs value from an EMFSPOOL font record, passes a signed bounds check, and uses it as the size for realloc. Access to a virtual machine or remote desktop and enabled virtual printing are required; the service runs on the Windows host.

The record

CVE
CVE-2022-22938
Published
Jan 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0VMwareCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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