CVE-2023-54301 serial: 8250_bcm7271: fix leak in `brcmuart_probe`

Not scored Published 30 Dec 2025 Updated 11 May 2026

A memory leak in the Linux kernel's BCM7271 serial driver can lead to resource exhaustion and denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-54301?

CVE-2023-54301 is a memory corruption vulnerability in Linux, published on 30 Dec 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:

serial: 8250_bcm7271: fix leak in `brcmuart_probe`

Smatch reports: drivers/tty/serial/8250/8250_bcm7271.c:1120 brcmuart_probe() warn: 'baud_mux_clk' from clk_prepare_enable() not released on lines: 1032.

The issue is fixed by using a managed clock.

Which versions are affected by CVE-2023-54301?

How do I fix CVE-2023-54301?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-54301 being exploited?

There is no known exploitation of CVE-2023-54301 in the wild and no public exploit code.

Sources

Also known as BELL-CVE-2023-54301, DEBIAN-CVE-2023-54301, GHSA-74ph-x5j9-xhpq, UBUNTU-CVE-2023-54301.