CVE-2024-27000: Debian Linux

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: serial: mxs-auart: add spinlock around changing cts state The uart_handle_cts_change() function in serial_core expects the caller to hold uport->lock. For example, I have seen the below kernel splat, when the Bluetooth driver is loaded on an i.MX28 board. [ 85.119255] ------------[ cut here ]------------ [ 85.124413] WARNING: CPU: 0 PID: 27 at /drivers/tty/serial/serial_core.c:3453 uart_handle_cts_change+0xb4/0xec [ 85.134694] Modules linked in: hci_uart bluetooth ecdh_generic ecc wlcore_sdio configfs [ 85.143314] CPU: 0 PID: 27 Comm: kworker/u3:0 Not tainted 6.6.3-00021-gd62a2f068f92 #1 [ 85.151396] Hardware name: Freescale MXS (Device Tree) [ 85.156679] Workqueue: hci0 hci_power_on [bluetooth] (...) [ 85.191765] uart_handle_cts_change from mxs_auart_irq_handle+0x380/0x3f4 [ 85.198787] mxs_auart_irq_handle from __handle_irq_event_percpu+0x88/0x210 (...)

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 38 only; version 39 only; version 40 only
• Linux Linux Kernel: from 3.18, before 4.19.313 (fixed in 4.19.313); from 4.20, before 5.4.275 (fixed in 5.4.275); from 5.5, before 5.10.216 (fixed in 5.10.216); from 5.11, before 5.15.158 (fixed in 5.15.158); from 5.16, before 6.1.88 (fixed in 6.1.88); from 6.2, before 6.6.29 (fixed in 6.6.29); …

Published 2024-05-01. Last modified 2026-06-17.