An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
2.79-1ubuntu0.72.80-1.1ubuntu1.72.86-1.1ubuntu0.32.68-1ubuntu0.2+esm22.79-1ubuntu0.16.04.1+esm2Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:NI:NA:HCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H