CVE-2023-53206: hwmon: (pmbus_core) Fix NULL pointer dereference

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-15 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus_core) Fix NULL pointer dereference Pass i2c_client to _pmbus_is_enabled to drop the assumption that a regulator device is passed in. This will fix the issue of a NULL pointer dereference when called from _pmbus_get_flags.

Affected products

Linux kernel: from 6.4 before 6.4.8; 6.5-rc1, 6.5-rc2, 6.5-rc3 — fixed in 6.4.8

How to fix

Upgrade to a fixed version: Linux kernel 6.4.8. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0bd66784274a287beada2933c2c0fa3a0ddae0d7
https://git.kernel.org/stable/c/7444253cacd92412bc8d33d1c9b5401f52cdf0e2

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