Linux Kernel up to 6.3.3 serial arc_uart.c arc_serial_probe memory leak

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.3.3 and classified as critical. This affects the function arc_serial_probe of the file drivers/tty/serial/arc_uart.c of the component serial. This manipulation causes memory leak. This vulnerability appears as CVE-2023-53719. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.3.3. It has been declared as critical. Affected by this vulnerability is the function arc_serial_probe of the file drivers/tty/serial/arc_uart.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: arc_uart: fix of_iomap leak in `arc_serial_probe` Smatch reports: drivers/tty/serial/arc_uart.c:631 arc_serial_probe() warn: 'port->membase' from of_iomap() not released on lines: 631. In arc_serial_probe(), if uart_add_one_port() fails, port->membase is not released, which would cause a resource leak. To fix this, I replace of_iomap with devm_platform_ioremap_resource.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53719 since 10/22/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 284758 (EulerOS 2.0 SP10 : kernel (EulerOS-SA-2026-1029)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.284, 5.4.244, 5.10.181, 5.15.113, 6.1.30 or 6.3.4 eliminates this vulnerability. Applying the patch 3f00df24a5021a6f02c1830a290acd4bceb22a2d/7525aa211758cc023a371e010d16ceaae1057807/153017561d2804cfae87cc9aa377aa84dd906ae1/f76a18e53a66c0ef2938276110717b3805720cd9/081790eee6b47389a0d895262086d64c6a38d6e5/40a462313ba4f337a2b419e7fb4a670f3dd95e14/8ab5fc55d7f65d58a3c3aeadf11bdf60267cd2bd 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 databases at Tenable (284758) and CERT Bund (WID-SEC-2025-2394). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell NetWorker

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.283
• 5.4.243
• 5.10.180
• 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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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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