CVE-2023-52863: hwmon: (axi-fan-control) Fix possible NULL pointer dereference

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-21 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (axi-fan-control) Fix possible NULL pointer dereference axi_fan_control_irq_handler(), dependent on the private axi_fan_control_data structure, might be called before the hwmon device is registered. That will cause an "Unable to handle kernel NULL pointer dereference" error.

Affected products

Linux kernel: from 5.7 before 5.10.201; from 5.11 before 5.15.139; from 5.16 before 6.1.63; from 6.2 before 6.5.12; from 6.6 before 6.6.2 — fixed in 5.10.201, 5.15.139, 6.1.63, 6.5.12, 6.6.2

How to fix

Upgrade to a fixed version: Linux kernel 5.10.201, 5.15.139, 6.1.63, 6.5.12. Check the vendor advisory for mitigations.

References

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