CVE-2022-50374
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-17

Last updated on: 2025-12-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure. While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().
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Meta Information
Published
2025-09-17
Last Modified
2025-12-11
Generated
2026-06-16
AI Q&A
2025-09-17
EPSS Evaluated
2026-06-14
NVD
CVE-2022-50374
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 4.14.63 (inc) to 4.15 (exc)
linux linux_kernel From 4.14.63 (inc) to 5.10.150 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.75 (exc)
linux linux_kernel From 5.16 (inc) to 5.19.17 (exc)
linux linux_kernel From 6.0 (inc) to 6.0.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-908 The product uses or accesses a resource that has not been initialized.
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Executive Summary

This vulnerability in the Linux kernel's Bluetooth subsystem involves improper handling of a failure in percpu_init_rwsem(), which leads to a NULL pointer dereference in the function hci_uart_tty_close(). Specifically, rcu_sync_enter() is called without a prior rcu_sync_init() because hci_uart_tty_open() ignores the failure of percpu_init_rwsem(). Additionally, hci_uart_register_device() also ignores this failure, and hci_uart_unregister_device() fails to free the rwsem properly.

Impact Analysis

The vulnerability can cause a NULL pointer dereference in the Bluetooth subsystem of the Linux kernel, which may lead to system crashes or instability when Bluetooth devices are used or managed. This could result in denial of service or unexpected behavior in systems relying on Bluetooth functionality.

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