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().

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1 cve-icon cve-icon
https://git.kernel.org/stable/c/75b2c71ea581c7bb1303860d89366a42ad0506d2 cve-icon cve-icon
https://git.kernel.org/stable/c/98ce10f3f345e61fc6c83bff9cd11cda252b05ac cve-icon cve-icon
https://git.kernel.org/stable/c/b8917dce2134739b39bc0a5648b18427f2cad569 cve-icon cve-icon
https://git.kernel.org/stable/c/d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025091717-CVE-2022-50374-6da4@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50374 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50374 cve-icon
History

Thu, 18 Sep 2025 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 18 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 17 Sep 2025 15:00:00 +0000

Type Values Removed Values Added
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().
Title Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-17T14:56:28.974Z

Updated: 2025-09-17T14:56:28.974Z

Reserved: 2025-09-17T14:53:06.996Z

Link: CVE-2022-50374

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-17T15:15:36.427

Modified: 2025-09-18T13:43:34.310

Link: CVE-2022-50374

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-17T00:00:00Z

Links: CVE-2022-50374 - Bugzilla