CVE-2023-52863

Kernel crash via early fan-control interrupt

Published May 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux axi-fan-control hwmon driver allows local users to crash the kernel by triggering its IRQ handler. During probe, axi_fan_control_probe registers the interrupt handler before initializing and registering ctl->hdev, so an early interrupt makes axi_fan_control_irq_handler dereference a NULL device pointer. The affected driver and supported ADI Fan Control IP must be present; the documented consequence is a kernel crash, not data access.

CVSS severity5.5
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

NULL pointer dereference in the Linux axi-fan-control hwmon driver allows local users to crash the kernel by triggering its IRQ handler. During probe, axi_fan_control_probe registers the interrupt handler before initializing and registering ctl->hdev, so an early interrupt makes axi_fan_control_irq_handler dereference a NULL device pointer. The affected driver and supported ADI Fan Control IP must be present; the documented consequence is a kernel crash, not data access.

The record

CVE
CVE-2023-52863
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7
  2. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <2a5b3370a1d9750eca325292e291c8c7cb8cf2e0
  3. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <33de53a2706066d526173dc743faf43d92c62105
  4. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <7d870088db4863c514a7f8751cd593751983029a
  5. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <b3e7eb23a6e97642ff3190431c06475d9ca1e062
  6. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <c49f14cc1bb12c625a1c572e8a95b6adefd4d8eb
  7. Affected versionversion=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <f62b8969847850ba7596cb145cc47c65ea57dae0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <2a5b3370a1d9750eca325292e291c8c7cb8cf2e0; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <33de53a2706066d526173dc743faf43d92c62105; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <7d870088db4863c514a7f8751cd593751983029a; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <b3e7eb23a6e97642ff3190431c06475d9ca1e062; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <c49f14cc1bb12c625a1c572e8a95b6adefd4d8eb; version=8412b410fa5e1e494a0fec84c3c462d49870d3f5 <f62b8969847850ba7596cb145cc47c65ea57dae0

Published CVSS scores

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
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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