CVE-2023-52613

Kernel crash via incorrect thermal-zone error check

Published Mar 18, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux 6.6 allows local users to crash the system through the Loongson2 thermal driver. The loongson2_thermal_probe path compares PTR_ERR(tz) with the wrong error value; when thermal-zones are undefined, it continues with tz->type set to NULL and thermal_add_hwmon_sysfs reaches strscpy on the invalid pointer. Reachability requires a Loongson2 platform with the driver loaded and no thermal-zones definition, and the bounded consequence is a kernel oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.22%
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 Linux 6.6 allows local users to crash the system through the Loongson2 thermal driver. The loongson2_thermal_probe path compares PTR_ERR(tz) with the wrong error value; when thermal-zones are undefined, it continues with tz->type set to NULL and thermal_add_hwmon_sysfs reaches strscpy on the invalid pointer. Reachability requires a Loongson2 platform with the driver loaded and no thermal-zones definition, and the bounded consequence is a kernel oops and service interruption.

The record

CVE
CVE-2023-52613
Published
Mar 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=6.6
  2. Affected versionversion=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <15ef92e9c41124ee9d88b01208364f3fe1f45f84
  3. Affected versionversion=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <6010a9fc14eb1feab5cafd84422001134fe8ec58
  4. Affected versionversion=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <70481755ed77400e783200e2d022e5fea16060ce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <15ef92e9c41124ee9d88b01208364f3fe1f45f84; version=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <6010a9fc14eb1feab5cafd84422001134fe8ec58; version=e7e3a7c35791fe7a70997883fb8ada5866a40f4d <70481755ed77400e783200e2d022e5fea16060ce

Published CVSS scores

5.5CISA-ADPCVSS: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

T1499Endpoint Denial of Service

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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