CVE-2022-4129

Summary

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 Software

Weaknesses

• CWE-667: CWE-667->CWE-362->CWE-476

ADP Enrichment

CVE Program Container

Additional References

• https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
• https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t
• 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/
• https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
• https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t
• 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/
• https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html

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