#VU111601 Improper locking in Linux kernel - CVE-2025-38040
Published: June 20, 2025
Vulnerability identifier: #VU111601
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-38040
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 repository.
External links
- https://git.kernel.org/stable/c/1bd2aad57da95f7f2d2bb52f7ad15c0f4993a685
- https://git.kernel.org/stable/c/68435c1fa3db696db4f480385db9e50e26691d0d
- https://git.kernel.org/stable/c/7187ec6b0b9ff22ebac2c3bb4178b7dbbdc0a55a
- https://git.kernel.org/stable/c/c504c11b94d6e4ad818ca5578dffa8ff29ad0f20
- https://git.kernel.org/stable/c/e6a46719a2369eb5186d4f7e6c0478720ca1ec3d