A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
Exploitability
AV:NAC:HPR:NUI:NScope
S:UImpact
C:NI:LA:H6.5/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H