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

What is CVE-2023-53206?

CVE-2023-53206 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2023-53206?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53206?

Apply the vendor's patch.

Is CVE-2023-53206 being exploited?

There is no known exploitation of CVE-2023-53206 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-53206, DEBIAN-CVE-2023-53206, GHSA-px5w-pf7q-23jq, UBUNTU-CVE-2023-53206.