The socket implementation in net/core/sock.c in the Linux kernel before
2.6.34 does not properly manage a backlog of received packets, which allows
remote attackers to cause a denial of service (memory consumption) by
sending a large amount of network traffic, as demonstrated by netperf UDP
tests.

Alex Shi and Eric Dumazet discovered that the network stack did not
correctly handle packet backlogs. A remote attacker could exploit this by
sending a large amount of network traffic to cause the system to run out of
memory, leading to a denial of service.