CVE-2022-4129
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP).
Published Nov 28, 2022 · updated Oct 14, 2026 · linux layer 2 tunneling protocol
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.
Timeline
Detection, updates, and resolution for this record.
Nov 28, 2022 · NIST NVD
Detected
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.
Oct 14, 2026 · NIST NVD
Updated
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.
Affected
- cpe fedoraproject/fedora35
- cpe fedoraproject/fedora36
- cpe fedoraproject/fedora37
- cpe linux/layer 2 tunneling protocolversion unspecified
Sources
- CVE.orgCVE-2022-4129
Official CVE identifier
cve.org - NIST NVDCVE-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.
nvd.nist.gov