CVE-2024-27000

serial: mxs-auart: add spinlock around changing cts state

HIGH

7.8

CVSS Score

Published: May 1, 2024 at 05:28 AM UTC

Updated: June 17, 2026 at 07:18 AM UTC

3 products affected across 3 vendorsLinux KernelDebian LinuxFedora

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Severity

HIGH7.8

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

10.0

Fedora · Fedora Projectrpm

95%

38 39 40

Linux Kernel · Linux

95%

3.18 ≤ v < 4.19.3133.18 ≤ v < 5.10.2163.18 ≤ v < 5.15.1583.18 ≤ v < 5.4.2753.18 ≤ v < 6.1.883.18 ≤ v < 6.6.293.18 ≤ v < 6.8.83.18 ≤ v < 6.94.20 ≤ v < 5.4.2755.11 ≤ v < 5.15.1585.16 ≤ v < 6.1.885.5 ≤ v < 5.10.2166.2 ≤ v < 6.6.296.7 ≤ v < 6.8.83.184d90bb147ef6b91f529a21b498ff2b5fdc6785b46.9 rc1 6.9 rc2 6.9 rc3 6.9 rc4

Vendor states this is fixed in 0dc0637e6b16158af85945425821bfd0151adb37 (fixed)

Vendor states this is fixed in 21535ef0ac1945080198fe3e4347ea498205c99a (fixed)

Vendor states this is fixed in 2c9b943e9924cf1269e44289bc5e60e51b0f5270 (fixed)

Vendor states this is fixed in 479244d68f5d94f3903eced52b093c1e01ddb495 (fixed)

Vendor states this is fixed in 54c4ec5f8c471b7c1137a1f769648549c423c026 (fixed)

Vendor states this is fixed in 56434e295bd446142025913bfdf1587f5e1970ad (fixed)

Vendor states this is fixed in 5f40fd6ca2cf0bfbc5a5c9e403dfce8ca899ba37 (fixed)

Vendor states this is fixed in 94b0e65c75f4af888ab2dd6c90f060f762924e86 (fixed)

Vendor states this is fixed in 3.18 (unaffected)

Vendor states this is fixed in 4.19.313 (unaffected)

Vendor states this is fixed in 5.10.216 (unaffected)

Vendor states this is fixed in 5.15.158 (unaffected)