With CVE-2019-11477, a string of TCP SACK responses will cause the Linux kernel to unexpectedly hit an internal data structure limit, triggering a fatal panic. The others affecting Linux will force the system to consume resources, thus slowing it down, as Red Hat explained in its technical summary today.

Source: Sad SACK: Linux PCs, servers, gadgets can be crashed by ‘Ping of Death’ network packets • The Register