Linux Kernel up to 5.15.112/6.1.29/6.3.3 serial 8250_bcm7271.c brcmuart_probe memory leak

Summaryinfo

A vulnerability has been found in Linux Kernel up to 5.15.112/6.1.29/6.3.3 and classified as critical. Affected by this issue is the function brcmuart_probe of the file drivers/tty/serial/8250/8250_bcm7271.c of the component serial. This manipulation causes memory leak. This vulnerability is registered as CVE-2023-54301. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.15.112/6.1.29/6.3.3 and classified as critical. Affected by this vulnerability is the function brcmuart_probe of the file drivers/tty/serial/8250/8250_bcm7271.c of the component serial. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-54301 since 12/30/2025. Technical details are known, but no exploit is available.

Upgrading to version 5.15.113, 6.1.30 or 6.3.4 eliminates this vulnerability. Applying the patch 5258395e67fee6929fb8e50c8239f8de51b8cb2d/2a3e5f428fc4315be6144524912eaefac16f43a9/56a81445b8e4b8906d557518c5dae3ddbb447d1e/f264f2f6f4788dc031cef60a0cf2881902736709 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2941). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.15.112
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.1.28
• 6.1.29
• 6.3.0
• 6.3.1
• 6.3.2
• 6.3.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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