CVE-2023-2194

Kernel crash via unchecked I2C block length

Published Apr 20, 2023 · Updated Apr 23, 2025

Out-of-bounds write in Linux Kernel before 6.3-rc4 allows local users with SLIMpro I2C device access to crash the system. The slimpro_i2c_blkwr path passes an unchecked user-derived data->block[0] length to memcpy, which writes beyond dma_buffer. Access to the device requires elevated privileges; a kernel crash is documented, while reliable code execution remains unconfirmed.

CVSS severity6.7
Medium
EPSS probability0.24%
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 Linux Kernel before 6.3-rc4 allows local users with SLIMpro I2C device access to crash the system. The slimpro_i2c_blkwr path passes an unchecked user-derived data->block[0] length to memcpy, which writes beyond dma_buffer. Access to the device requires elevated privileges; a kernel crash is documented, while reliable code execution remains unconfirmed.

The record

CVE
CVE-2023-2194
Published
Apr 20, 2023
Updated
Apr 23, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

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  1. Affected versionversion=Fixed in kernel v6.3-rc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Fixed in kernel v6.3-rc4

Published CVSS scores

6.7Canonical Ubuntu Security TeamCVSS:3.1/AV:L/AC:L/PR:H/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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