SB20250327141 - Improper locking in Linux kernel l2tp
Published: March 27, 2025 Updated: May 11, 2025
Security Bulletin ID
SB20250327141
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2023-53020)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the l2tp_xmit_core(), l2tp_tunnel_create() and l2tp_tunnel_register() functions in net/l2tp/l2tp_core.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0b2c59720e65885a394a017d0cf9cab118914682
- https://git.kernel.org/stable/c/2d77e5c0ad79004b5ef901895437e9cce6dfcc7e
- https://git.kernel.org/stable/c/77e8ed776cdb1a24b2aab8fe7c6f1f154235e1ce
- https://git.kernel.org/stable/c/cef0845b6dcfa2f6c2c832e7f9622551456c741d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.9