In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL pointer dereference in unpack_pdb pdb->dfa could be NULL if unpack_dfa fails, causing a NULL pointer dereference.Referenceshttps://git.kernel.org/stable/c/fbfdb5a94a48797bea232791e24c38f3aa3063c8https://git.kernel.org/stable/c/73d86ca950b80cd39ca948e2c518d135bf2308c8https://git.kernel.org/stable/c/7681ca43d2b1c776e62fe77e3167835fb1ab8319
