A flaw was found in the Linux kernel Traffic Control (TC) subsystem. A specific networking configuration which redirects egress packets to ingress using TC action "mirred" could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.
A flaw was found in the Linux kernel Traffic Control (TC) subsystem. A specific networking configuration which redirects egress packets to ingress using TC action "mirred" could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.