#VU119754 Improper locking in Linux kernel - CVE-2023-53809
Published: December 10, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119754
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-53809
CWE-ID: CWE-667
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 perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the pppol2tp_tunnel_mtu() and pppol2tp_connect() functions in net/l2tp/l2tp_ppp.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/4a413d360959962995e16a899cf2b9ef53e9fcb9
- https://git.kernel.org/stable/c/4bb736b40475528ac1aa8c98b368563618488a70
- https://git.kernel.org/stable/c/5370647dd745bb3d8f37057006be207ddd8e9314
- https://git.kernel.org/stable/c/9ca5e7ecab064f1f47da07f7c1ddf40e4bc0e5ac
- https://git.kernel.org/stable/c/f6df58aa15f7d469f69b1dd21b001ff483255244
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.99