A heap-based buffer overflow vulnerability exists in Hitachi Dynamic Link Manager for Linux versions from 7.5.0-00 up to but not including 9.0.5-00. This vulnerability could allow an attacker with local access and low privileges to cause a high-impact compromise, including full confidentiality, integrity, and availability loss. The vulnerability is identified as CVE-2026-91760 and has a CVSS v3.1 base score of 7.0, indicating high severity.