In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the dissection engine could crash. This was addressed in epan/tvbuff_composite.c by preventing a heap-based buffer over-read.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 52.1%