SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionIn the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control. (CVE-2018-18559)
An attacker can exploit this vulnerability by executing arbitrary code with elevated privileges.
SolutionUpgrade to one of the non-vulnerable versions listed in the F5 Solution K28241423.