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[$] The TCP SACK panic
Wednesday June 19, 2019. 11:24 PM , from LWN.net
Selective
acknowledgment (SACK) is a technique used by TCP to help alleviate congestion that can arise due to the retransmission of dropped packets. It allows the endpoints to describe which pieces of the data they have received, so that only the missing pieces need to be retransmitted. However, a bug was recently found in the Linux implementation of SACK that allows remote attackers to panic the system by sending crafted SACK information.
https://lwn.net/Articles/791409/rss
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