# CVE-2026-91759: Hitachi Dynamic Link Manager for Linux out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-91759-out-of-bounds-write-vulnerability-in-hitachi-dynamic-link-manager  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-91759 · Severity: high · CVSS 7.8 · Published 2026-11-10

Hitachi Dynamic Link Manager for Linux is storage management software used by enterprises to manage disk arrays and storage systems. An out-of-bounds write vulnerability in this software allows a local attacker with limited privileges to execute arbitrary code, potentially leading to complete system compromise including data theft, system tampering, and service disruption.

Technologies: [Hitachi Dynamic Link Manager for Linux](https://junglewise.ai/threats/technologies/dynamic-link-manager-for-linux). Vendors: [Hitachi](https://junglewise.ai/threats/vendors/hitachi).

## Quick answers

**Is CVE-2026-91759 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91759 being exploited in the wild.

**How severe is CVE-2026-91759?** High severity, with a CVSS score of 7.8, published 10 November 2026.

**Which products and versions are affected?** Hitachi Dynamic Link Manager for Linux 7.5.0-00 to 9.0.3-01.

**Is there a fix for CVE-2026-91759?** Yes: fixed in 9.0.5-00. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-91759 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91759?** Check whether you run Hitachi Dynamic Link Manager for Linux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 9.0.5-00

## Technical details

An out-of-bounds write vulnerability in Hitachi Dynamic Link Manager for Linux (CVE-2026-91759) allows local privileged users to write data outside allocated memory boundaries. The vulnerability requires local access and low-level user privileges (no root required), and can result in memory corruption, code execution, information disclosure, and denial of service. A patch is available in version 9.0.5-00.

## Affected products

- Hitachi Dynamic Link Manager for Linux 7.5.0-00 to 9.0.3-01

## Timeline

- 2026-11-10: disclosed

## References

- [https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-166/index.html](https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-166/index.html)

## Related threats

- [Hitachi Dynamic Link Manager for Linux improper link resolution](https://junglewise.ai/threats/cve-2026-91764-improper-link-resolution-before-file-access-vulnerability-in)
- [Hitachi Dynamic Link Manager for Linux symlink following vulnerability](https://junglewise.ai/threats/cve-2026-91763-unix-symbolic-link-symlink-following-vulnerability-in-hitachi)
- [Hitachi Dynamic Link Manager for Linux symlink following vulnerability](https://junglewise.ai/threats/cve-2026-91762-unix-symbolic-link-symlink-following-vulnerability-in-hitachi)
- [Hitachi Dynamic Link Manager for Linux symlink following vulnerability](https://junglewise.ai/threats/cve-2026-91761-unix-symbolic-link-symlink-following-vulnerability-in-hitachi)
- [Hitachi Dynamic Link Manager for Linux heap buffer overflow](https://junglewise.ai/threats/cve-2026-91760-heap-based-buffer-overflow-vulnerability-in-hitachi-dynamic-link)