CVE-2024-38634: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: serial: max3100: Lock port->lock when calling uart_handle_cts_change() uart_handle_cts_change() has to be called with port lock taken, Since we run it in a separate work, the lock may not be taken at the time of running. Make sure that it's taken by explicitly doing that. Without it we got a splat: WARNING: CPU: 0 PID: 10 at drivers/tty/serial/serial_core.c:3491 uart_handle_cts_change+0xa6/0xb0 ... Workqueue: max3100-0 max3100_work [max3100] RIP: 0010:uart_handle_cts_change+0xa6/0xb0 ... max3100_handlerx+0xc5/0x110 [max3100] max3100_work+0x12a/0x340 [max3100]

Affected products

• Linux Linux Kernel: from 2.6.31, before 4.19.316 (fixed in 4.19.316); from 4.20, before 5.4.278 (fixed in 5.4.278); from 5.5, before 5.10.219 (fixed in 5.10.219); from 5.11, before 5.15.161 (fixed in 5.15.161); from 5.16, before 6.1.93 (fixed in 6.1.93); from 6.2, before 6.6.33 (fixed in 6.6.33); …

Published 2024-06-21. Last modified 2026-06-17.