CVE-2023-23000

Local system crash via unchecked error pointer

Published Mar 1, 2023 · Updated Mar 20, 2025

NULL pointer dereference in the Linux kernel before 5.17 allows local users to crash systems through the Tegra XUSB PHY driver. tegra_xusb_find_port_node returns ERR_PTR(-ENOMEM) when kasprintf fails, while its callers test only for NULL and then treat the error pointer as a valid device-tree node. Exploitation requires local access, a Tegra system using this driver, and execution of the memory-allocation failure path.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel before 5.17 allows local users to crash systems through the Tegra XUSB PHY driver. tegra_xusb_find_port_node returns ERR_PTR(-ENOMEM) when kasprintf fails, while its callers test only for NULL and then treat the error pointer as a valid device-tree node. Exploitation requires local access, a Tegra system using this driver, and execution of the memory-allocation failure path.

The record

CVE
CVE-2023-23000
Published
Mar 1, 2023
Updated
Mar 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 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

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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