CVE-2022-50419

Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times

State: Published
Severity: 8.8 High
Published: Sep 18, 2025
Updated: Aug 5, 2026
Reserved: Sep 17, 2025

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>

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-415 Double Free

Affected Products

Product	Versions
LinuxLinux	b219e3ac66183fc9771b94af931fb5fd41d586ec to before 4bcefec3636208b4c97536b26014d5935d5c10a0Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 6144423712d570247b8ca26e50a277c30dd13702Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 671fee73e08ff415d36a7c16bdf238927df83884Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 6e85d2ad958c6f034b1b158d904019869dbb3c81Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 7b674dce4162bb46d396586e30e4653427023875Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 3423a50fa018e88aed4c900d59c3c8334d8ad583Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before ef055094df4c10b73cfe67c8d43f9de1fb608a8bAffected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 1b6c89571f453101251201f0fad1c26f7256e937Affected b219e3ac66183fc9771b94af931fb5fd41d586ec to before 448a496f760664d3e2e79466aa1787e6abc922b5Affected
LinuxLinux	2.6.19Affected before 2.6.19Not affected 4.9.331 through 4.9.Not affected 4.14.296 through 4.14.Not affected 4.19.262 through 4.19.Not affected 5.4.220 through 5.4.Not affected 5.10.150 through 5.10.Not affected 5.15.75 through 5.15.Not affected 5.19.17 through 5.19.Not affected 6.0.3 through 6.0.Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

b219e3ac66183fc9771b94af931fb5fd41d586ec to before 4bcefec3636208b4c97536b26014d5935d5c10a0Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 6144423712d570247b8ca26e50a277c30dd13702Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 671fee73e08ff415d36a7c16bdf238927df83884Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 6e85d2ad958c6f034b1b158d904019869dbb3c81Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 7b674dce4162bb46d396586e30e4653427023875Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 3423a50fa018e88aed4c900d59c3c8334d8ad583Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before ef055094df4c10b73cfe67c8d43f9de1fb608a8bAffected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 1b6c89571f453101251201f0fad1c26f7256e937Affected
b219e3ac66183fc9771b94af931fb5fd41d586ec to before 448a496f760664d3e2e79466aa1787e6abc922b5Affected

LinuxLinux

2.6.19Affected
before 2.6.19Not affected
4.9.331 through 4.9.*Not affected
4.14.296 through 4.14.*Not affected
4.19.262 through 4.19.*Not affected
5.4.220 through 5.4.*Not affected
5.10.150 through 5.10.*Not affected
5.15.75 through 5.15.*Not affected
5.19.17 through 5.19.*Not affected
6.0.3 through 6.0.*Not affected
6.1 and laterNot affected

References

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