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CVE-2024-27000

Disclosure Date: May 01, 2024 •
CVE-2024-27000
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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
(...)

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CVSS V3 Severity and Metrics
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Impact Score:
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Exploitability Score:
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Vector:
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Attack Vector (AV):
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Privileges Required (PR):
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User Interaction (UI):
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Scope (S):
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Confidentiality (C):
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Integrity (I):
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Availability (A):
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General Information

Offensive Application
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Utility Class
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Ports
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OS
Unknown
Vulnerable Versions
Linux 56434e295bd4
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis