CVE-2026-66369

The GOOSE parser contains an off-by-one boundary-handling flaw that can

be triggered by a single unauthenticated Layer-2 multicast frame on the

process bus. When specific GOOSE message fields are processed, the

parser advances its internal buffer position incorrectly, resulting in a

heap out-of-bounds read. On affected platforms, this condition reliably

terminates the subscriber process and causes a denial-of-service.