CVE-2023-53828
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_add_adv_monitor() KSAN reports use-after-free in hci_add_adv_monitor(). While adding an adv monitor, hci_add_adv_monitor() calls -> msft_add_monitor_pattern() calls -> msft_add_monitor_sync() calls -> msft_le_monitor_advertisement_cb() calls in an error case -> hci_free_adv_monitor() which frees the *moniter. This is referenced by bt_dev_dbg() in hci_add_adv_monitor(). Fix the bt_dev_dbg() by using handle instead of monitor->handle.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53828
EUVD
EUVD-2023-60168
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's Bluetooth subsystem, specifically in the function hci_add_adv_monitor(). During the process of adding an advertising monitor, a sequence of function calls can lead to freeing a monitor object prematurely in an error case. The problem arises because the debugging function bt_dev_dbg() incorrectly uses the freed monitor pointer instead of a safe handle, which can cause the system to access memory that has already been freed.

Impact Analysis

The use-after-free vulnerability can lead to undefined behavior such as system crashes, memory corruption, or potentially allow an attacker to execute arbitrary code within the kernel. This can compromise system stability and security, especially on devices using the affected Linux kernel Bluetooth functionality.

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