CVE-2025-22063 Information

Apr 17, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets

When calling netlbl_conn_setattr() addr->sa_family is used to determine the function behavior. If sk is an IPv4 socket but the connect function is called with an IPv6 address the function calipso_sock_setattr() is triggered. Inside this function the following code is executed:

sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;

Since sk is an IPv4 socket pinet6 is NULL leading to a null pointer dereference.

This patch fixes the issue by checking if inet6_sk(sk) returns a NULL pointer before accessing pinet6.

Reference

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