CVE-2024-8006

Remote packet capture support is disabled by default in libpcap. When a
user builds libpcap with remote packet capture support enabled, one of the
functions that become available is pcap_findalldevs_ex(). One of the
function arguments can be a filesystem path, which normally means a
directory with input data files. When the specified path cannot be used as
a directory, the function receives NULL from opendir(), but does not check
the return value and passes the NULL value to readdir(), which causes a
NULL pointer derefence.