CVE-2026-66369
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Jul 30, 2026
Vendor
unknown
Description
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.