CVE-2023-53520

MEDIUM EPSS 1.1%
Published Oct 1, 20259mo ago · Modified Jun 17, 20262w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In 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.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥5.7  –  <6.1.55
linuxlinux_kernel*≥6.2  –  <6.5.5

References 4

  • git.kernel.org https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1fa25a91091bbed691ba2996a6cee809e3309a2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1fa25a91091bbed691ba2996a6cee809e3309a2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6
    Patch