Improper handling of malformed Connection Request with the interval set to be 1 (which supposed to be illegal) and the chM 0x7CFFFFFFFF triggers a crash. The peripheral will not be connectable after it.
Exploitability
AV:AAC:LPR:NUI:NScope
S:UImpact
C:NI:NA:H6.5/CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HOther