SB2025062092 - Improper locking in Linux kernel driver-api serial

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Main Vulnerability Database SB2025062092

SB2025062092 - Improper locking in Linux kernel driver-api serial

Published: June 20, 2025

Security Bulletin ID SB2025062092
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper locking (CVE-ID: CVE-2025-38040)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the stm32_usart_enable_ms() function in drivers/tty/serial/stm32-usart.c, within the sci_shutdown() function in drivers/tty/serial/sh-sci.c, within the mctrl_gpio_enable_ms() and mctrl_gpio_disable_ms() functions in drivers/tty/serial/serial_mctrl_gpio.c, within the imx_uart_shutdown() function in drivers/tty/serial/imx.c, within the atmel_disable_ms() function in drivers/tty/serial/atmel_serial.c, within the serial8250_disable_ms() function in drivers/tty/serial/8250/8250_port.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References