linux-cve-announce - CVE-2022-50419: Bluetooth: hci_sysfs: Fix attempting to call device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025091855-CVE-2022-50419-23b9@gregkh>
Date: Thu, 18 Sep 2025 18:04:09 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50419: Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times

device_add shall not be called multiple times as stated in its
documentation:

 'Do not call this routine or device_register() more than once for
 any device structure'

Syzkaller reports a bug as follows [1]:
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:33!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[...]
Call Trace:
 <TASK>
 __list_add include/linux/list.h:69 [inline]
 list_add_tail include/linux/list.h:102 [inline]
 kobj_kset_join lib/kobject.c:164 [inline]
 kobject_add_internal+0x18f/0x8f0 lib/kobject.c:214
 kobject_add_varg lib/kobject.c:358 [inline]
 kobject_add+0x150/0x1c0 lib/kobject.c:410
 device_add+0x368/0x1e90 drivers/base/core.c:3452
 hci_conn_add_sysfs+0x9b/0x1b0 net/bluetooth/hci_sysfs.c:53
 hci_le_cis_estabilished_evt+0x57c/0xae0 net/bluetooth/hci_event.c:6799
 hci_le_meta_evt+0x2b8/0x510 net/bluetooth/hci_event.c:7110
 hci_event_func net/bluetooth/hci_event.c:7440 [inline]
 hci_event_packet+0x63d/0xfd0 net/bluetooth/hci_event.c:7495
 hci_rx_work+0xae7/0x1230 net/bluetooth/hci_core.c:4007
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

The Linux kernel CVE team has assigned CVE-2022-50419 to this issue.


Affected and fixed versions
===========================

	Fixed in 4.9.331 with commit 4bcefec3636208b4c97536b26014d5935d5c10a0
	Fixed in 4.14.296 with commit 6144423712d570247b8ca26e50a277c30dd13702
	Fixed in 4.19.262 with commit 671fee73e08ff415d36a7c16bdf238927df83884
	Fixed in 5.4.220 with commit 6e85d2ad958c6f034b1b158d904019869dbb3c81
	Fixed in 5.10.150 with commit 7b674dce4162bb46d396586e30e4653427023875
	Fixed in 5.15.75 with commit 3423a50fa018e88aed4c900d59c3c8334d8ad583
	Fixed in 5.19.17 with commit ef055094df4c10b73cfe67c8d43f9de1fb608a8b
	Fixed in 6.0.3 with commit 1b6c89571f453101251201f0fad1c26f7256e937
	Fixed in 6.1 with commit 448a496f760664d3e2e79466aa1787e6abc922b5

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2022-50419
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/bluetooth/hci_sysfs.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/4bcefec3636208b4c97536b26014d5935d5c10a0
	https://git.kernel.org/stable/c/6144423712d570247b8ca26e50a277c30dd13702
	https://git.kernel.org/stable/c/671fee73e08ff415d36a7c16bdf238927df83884
	https://git.kernel.org/stable/c/6e85d2ad958c6f034b1b158d904019869dbb3c81
	https://git.kernel.org/stable/c/7b674dce4162bb46d396586e30e4653427023875
	https://git.kernel.org/stable/c/3423a50fa018e88aed4c900d59c3c8334d8ad583
	https://git.kernel.org/stable/c/ef055094df4c10b73cfe67c8d43f9de1fb608a8b
	https://git.kernel.org/stable/c/1b6c89571f453101251201f0fad1c26f7256e937
	https://git.kernel.org/stable/c/448a496f760664d3e2e79466aa1787e6abc922b5