CVE-2023-53520

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  3. CVE-2023-53520

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix hci_suspend_sync crash If hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier may still be accessing it, it can cause the program to crash. Here's the call trace: <4>[102152.653246] Call Trace: <4>[102152.653254] hci_suspend_sync+0x109/0x301 [bluetooth] <4>[102152.653259] hci_suspend_dev+0x78/0xcd [bluetooth] <4>[102152.653263] hci_suspend_notifier+0x42/0x7a [bluetooth] <4>[102152.653268] notifier_call_chain+0x43/0x6b <4>[102152.653271] __blocking_notifier_call_chain+0x48/0x69 <4>[102152.653273] __pm_notifier_call_chain+0x22/0x39 <4>[102152.653276] pm_suspend+0x287/0x57c <4>[102152.653278] state_store+0xae/0xe5 <4>[102152.653281] kernfs_fop_write+0x109/0x173 <4>[102152.653284] __vfs_write+0x16f/0x1a2 <4>[102152.653287] ? selinux_file_permission+0xca/0x16f <4>[102152.653289] ? security_file_permission+0x36/0x109 <4>[102152.653291] vfs_write+0x114/0x21d <4>[102152.653293] __x64_sys_write+0x7b/0xdb <4>[102152.653296] do_syscall_64+0x59/0x194 <4>[102152.653299] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 This patch holds the reference count of the hci_dev object while processing it in hci_suspend_notifier to avoid potential crash caused by the race condition.

References
Link Resource
https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484 Patch
https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f Patch
https://git.kernel.org/stable/c/e1fa25a91091bbed691ba2996a6cee809e3309a2
https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

06 Feb 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/e1fa25a91091bbed691ba2996a6cee809e3309a2 -

26 Jan 2026, 20:05

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484 - () https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484 - Patch
References () https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f - () https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f - Patch
References () https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6 - () https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6 - Patch
CWE CWE-362

02 Oct 2025, 19:11

Type Values Removed Values Added
New CVE
Information

Published : 2025-10-01 12:15

Updated : 2026-02-06 17:16

NVD link : CVE-2023-53520

Mitre link : CVE-2023-53520

CVE.ORG link : CVE-2023-53520

JSON object : View

Products Affected

linux

CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')