CVE-2022-4129

medium

Description

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.

References

Advisories
More

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP/

https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t

https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t

https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-51494

https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Details

Source: Mitre, NVD

Published: 2022-11-28

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00176