CVE-2023-23006

Local system crash via error-pointer misclassification

Published Mar 1, 2023 · Updated Mar 19, 2025

Invalid pointer dereference in the Linux kernel before 5.15.13 allows local users to crash systems during mlx5 steering setup. dr_domain_init_resources treats an ERR_PTR from mlx5_get_uars_page as a successful allocation because it checks only for NULL, then continues with the invalid pointer. Low-privileged local access is required, and the bounded consequence is an availability-only system crash when UAR allocation fails.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid pointer dereference in the Linux kernel before 5.15.13 allows local users to crash systems during mlx5 steering setup. dr_domain_init_resources treats an ERR_PTR from mlx5_get_uars_page as a successful allocation because it checks only for NULL, then continues with the invalid pointer. Low-privileged local access is required, and the bounded consequence is an availability-only system crash when UAR allocation fails.

The record

CVE
CVE-2023-23006
Published
Mar 1, 2023
Updated
Mar 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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 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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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