CVE-2026-127122 Out-of-bounds write with too many MCR blocks in a Connect request

P-Net before 1.0.4 does not check the number of MCR request blocks in a Connect request against the number of multicast communication relations that an Application Relationship has room for PNETMAXMCCR, 1 by default. Each further block is written past the end of the array, into the rest of the...