Vulnerability in Linux Layer 2 Tunneling Protocol
CVE-2022-4129
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.
EPSS: 0.002 (6.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Layer_2_tunneling_protocol
- Fedoraproject Fedora — versions 35, 36, 37
- N/a Linux Kernel (L2tp) — versions up to v6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com
- secalert@redhat.com
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2022-4129?
- CVE-2022-4129 is a medium-severity vulnerability in Linux Layer 2 Tunneling Protocol, classified under Improper Locking. CVSS score: 5.5/10. Published 2022-11-28.
- How severe is CVE-2022-4129?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2022-4129 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.