What’s Vulnerable › Vulnerabilities

CVE-2023-53719: serial: arc_uart: fix of_iomap leak in `arc_serial_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: 2025-10-22 · updated 2026-10-28

Description

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.

Affected products

• Linux kernel: 3.17 — 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/081790eee6b47389a0d895262086d64c6a38d6e5
• https://git.kernel.org/stable/c/153017561d2804cfae87cc9aa377aa84dd906ae1
• https://git.kernel.org/stable/c/3f00df24a5021a6f02c1830a290acd4bceb22a2d
• https://git.kernel.org/stable/c/40a462313ba4f337a2b419e7fb4a670f3dd95e14
• https://git.kernel.org/stable/c/7525aa211758cc023a371e010d16ceaae1057807
• https://git.kernel.org/stable/c/8ab5fc55d7f65d58a3c3aeadf11bdf60267cd2bd
• https://git.kernel.org/stable/c/f76a18e53a66c0ef2938276110717b3805720cd9

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