CVE-2022-4095

Local privilege escalation via freed command object

Published Mar 22, 2023 · Updated Feb 26, 2025

Use-after-free in the RTL8712 wireless driver in Linux Kernel before 6.0-rc4 allows local users to crash the system or elevate privileges. The MAC-register handlers free a command object despite null callbacks, while cmd_hdl_filter returns that object for continued use and later release. Triggering requires local low-privileged access and initialization of an RTL8712 adapter; exploitation can crash the host or obtain kernel-level privileges.

CVSS severity7.8
High
EPSS probability0.26%
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 the RTL8712 wireless driver in Linux Kernel before 6.0-rc4 allows local users to crash the system or elevate privileges. The MAC-register handlers free a command object despite null callbacks, while cmd_hdl_filter returns that object for continued use and later release. Triggering requires local low-privileged access and initialization of an RTL8712 adapter; exploitation can crash the host or obtain kernel-level privileges.

The record

CVE
CVE-2022-4095
Published
Mar 22, 2023
Updated
Feb 26, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2025Record 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=Linux Kernel prior to kernel 6.0 rc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux Kernel prior to kernel 6.0 rc4

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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