PT-2025-49669 · Linux · Linux Kernel
Publicado
2025-12-09
·
Atualizado
2026-01-28
·
CVE-2023-53809
Nenhuma
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Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.2.0-rc5-00205-gc96618275234 #56
Description
The Linux kernel contains a flaw in the l2tp implementation that can lead to a recursive deadlock within the
l2tp tunnel register() function. This occurs when a file descriptor of a pppol2tp socket is passed as a file descriptor of a UDP socket. The issue is triggered by a specific program that attempts to connect using this configuration, resulting in a lock dependency warning and a potential system hang. The l2tp tunnel register() function and pppol2tp connect() are involved in the deadlock scenario.Recommendations
Update to a version later than 6.2.0-rc5-00205-gc96618275234 #56.
Exploit
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Identificadores relacionados
Produtos afetados
Linux Kernel