#VU116746 Use-after-free in Linux kernel - CVE-2023-53673
Published: October 8, 2025 / Updated: October 26, 2025
Vulnerability identifier: #VU116746
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-53673
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hci_cs_disconnect() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/093a07052406b363b1b2ab489e17dbadaf3e509b
- https://git.kernel.org/stable/c/59bd1e476bbc7bc6dff3c61bba787095a4839796
- https://git.kernel.org/stable/c/7f7cfcb6f0825652973b780f248603e23f16ee90
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5