CVE-2022-29021Public exploit

Kernel driver crash via unchecked RGB row length

Published May 20, 2022 · Updated Nov 3, 2025

Buffer overflow in OpenRazer 3.3.0 and earlier allows local users to crash the razerkbd kernel driver via matrix_custom_frame. The custom-frame handler derives row_length from attacker-controlled start and stop columns, then memcpy copies that length into an 80-byte arguments array without a bounds check. Exploitation requires write access to the device sysfs attribute; the demonstrated result is a driver crash, while kernel code execution also requires an information leak and absent FORTIFY_SOURCE.

CVSS severity9.8
Critical
EPSS probability2.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in OpenRazer 3.3.0 and earlier allows local users to crash the razerkbd kernel driver via matrix_custom_frame. The custom-frame handler derives row_length from attacker-controlled start and stop columns, then memcpy copies that length into an 80-byte arguments array without a bounds check. Exploitation requires write access to the device sysfs attribute; the demonstrated result is a driver crash, while kernel code execution also requires an information leak and absent FORTIFY_SOURCE.

The record

CVE
CVE-2022-29021
Published
May 20, 2022
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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