What is CVE-2023-53828?

CVE-2023-53828 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-12-09.

How severe is CVE-2023-53828?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2023-53828

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.

EPSS: 0.002 (12.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions b747a83690c8f53bc7a3f75899415c699b2c51aa, 6.0, 0

References

Frequently asked questions

What is CVE-2023-53828?: CVE-2023-53828 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-12-09.
How severe is CVE-2023-53828?: High severity. CVSS v3 base score is 7.8 out of 10.