CVE-2022-40133Public exploit

Local privilege escalation via vmw_execbuf_tie_context UAF

Published Sep 9, 2022 · Updated Sep 17, 2024

Use-after-free in Linux Kernel vmwgfx before 5.13.0-52 allows local users to gain privileges via crafted ioctl requests on /dev/dri/renderD128. The vmw_execbuf_tie_context function dereferences a context after it has been freed while processing vmwgfx execution-buffer commands, creating a use-after-free condition. Access requires a local account permitted to open the DRM render device; exploitation can crash the kernel for denial of service and the record reports privilege gain, with no confidentiality impact specified.

CVSS severity5.5
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel vmwgfx before 5.13.0-52 allows local users to gain privileges via crafted ioctl requests on /dev/dri/renderD128. The vmw_execbuf_tie_context function dereferences a context after it has been freed while processing vmwgfx execution-buffer commands, creating a use-after-free condition. Access requires a local account permitted to open the DRM render device; exploitation can crash the kernel for denial of service and the record reports privilege gain, with no confidentiality impact specified.

The record

CVE
CVE-2022-40133
Published
Sep 9, 2022
Updated
Sep 17, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=v4.20-rc1 <5.13.0-52*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=v4.20-rc1 <5.13.0-52*

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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