CVE-2023-2007

Kernel information disclosure via unlocked I2OUSRCMD race

Published Apr 24, 2023 · Updated Aug 2, 2024

A TOCTOU race in the Linux Kernel DPT I2O controller before 6.0-rc1 allows local users to disclose sensitive kernel data. The driver performs I2OUSRCMD operations on a shared object without proper locking, allowing its state to change between validation and use. Exploitation requires high-privileged code execution and access to a SCSI device using the driver; the disclosure can support a separate kernel privilege-escalation chain.

CVSS severity7.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A TOCTOU race in the Linux Kernel DPT I2O controller before 6.0-rc1 allows local users to disclose sensitive kernel data. The driver performs I2OUSRCMD operations on a shared object without proper locking, allowing its state to change between validation and use. Exploitation requires high-privileged code execution and access to a SCSI device using the driver; the disclosure can support a separate kernel privilege-escalation chain.

The record

CVE
CVE-2023-2007
Published
Apr 24, 2023
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-367, CWE-667, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=Fixed in kernel v6.0-rc1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Fixed in kernel v6.0-rc1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7Trend Micro Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
4.4SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-667Improper Locking
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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