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

Severity: unknown
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: 2025-12-30 · updated 2026-06-17

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.

Affected products

Linux kernel: 5.13 — fixed in 6.4

How to fix

Upgrade to a fixed version: Linux kernel 6.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2a3e5f428fc4315be6144524912eaefac16f43a9
https://git.kernel.org/stable/c/5258395e67fee6929fb8e50c8239f8de51b8cb2d
https://git.kernel.org/stable/c/56a81445b8e4b8906d557518c5dae3ddbb447d1e
https://git.kernel.org/stable/c/f264f2f6f4788dc031cef60a0cf2881902736709

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