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Test your applicationsThere is no fixed version for RHEL:9
kernel-debug-modules
.
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules
package and not the kernel-debug-modules
package as distributed by RHEL
.
See How to fix?
for RHEL:9
relevant fixed versions and status.
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.