#VU119698 Use-after-free in Linux kernel - CVE-2023-53827
Published: December 10, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119698
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-2023-53827
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 l2cap_disconnect_req() and l2cap_disconnect_rsp() functions in net/bluetooth/l2cap_core.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/1351551aa9058e07a20a27a158270cf84fcde621
- https://git.kernel.org/stable/c/348d446762e7c70778df8bafbdf3fa0df2123f58
- https://git.kernel.org/stable/c/a2a9339e1c9deb7e1e079e12e27a0265aea8421a
- https://git.kernel.org/stable/c/ac6725a634f7e8c0330610a8527f20c730b61115
- https://git.kernel.org/stable/c/c02421992505c95c7f3c9ad59ee35e22eac60988
- https://git.kernel.org/stable/c/d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284
- https://git.kernel.org/stable/c/d9ba36c22a7bb09d6bac4cc2f243eff05da53f43
- https://git.kernel.org/stable/c/f2d38e77aa5f3effc143e7dd24da8acf02925958
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.313