Out-of-Bounds Write Vulnerability in Hitachi Dynamic Link Manager for Linux
Hitachi Dynamic Link Manager for Linux versions 7.5.0-00 through 9.0.3-01 are in the affected range, and the range data lists 9.0.5-00 as the fixed version.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 9.0.5-00
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Hitachi Dynamic Link Manager for Linux in the affected version range 7.5.0-00 to 9.0.3-01
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.11% · 1st percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 14/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
Hitachi Dynamic Link Manager for Linux contains an out-of-bounds write flaw that a local attacker with low-privilege login can use to take full control of the system's confidentiality, integrity, and availability. The attacker must already have access to the machine, and no user interaction is needed.
Read the original description
Out-of-Bounds Write Vulnerability in Hitachi Dynamic Link Manager for Linux.
This issue affects Hitachi Dynamic Link Manager for Linux: from 7.5.0-00 before 9.0.5-00.
Who should check
Teams running Hitachi Dynamic Link Manager for Linux, versions 7.5.0-00 to 9.0.3-01, on Linux hosts.
cve.now Index
- Exploitation0/40No signal
- Exposure5/25Specific setups only
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.8/10CVSS 7.8, total technical impact per CISA
- No patch0/5No signal
What would change the score
- Would score about 64 if added to CISA KEV
- Would score about 59 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Hitachi Dynamic Link Manager for Linux in the affected version range 7.5.0-00 to 9.0.3-01Upgrade to a fixed version: 9.0.5-00.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-91759 (Out-of-Bounds Write Vulnerability in Hitachi Dynamic Link Manager for Linux), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-91759 (entry last updated 2026-11-10): Affected: - Hitachi Hitachi Dynamic Link Manager for Linux: from 7.5.0-00, fixed in 9.0.5-00 Fixed versions: 9.0.5-00. Conditions (all must be true for the bug to be hit): - Hitachi Dynamic Link Manager for Linux in the affected version range 7.5.0-00 to 9.0.3-01 (source: https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-166/index.html) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: local access, low-privilege login, no user action. CISA KEV: CVE-2026-91759 is not listed as of cve.now's last read. This KEV status is for CVE-2026-91759 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-166/index.html Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-91759 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-91759.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Hitachi Hitachi Dynamic Link Manager for Linux
From 7.5.0-00 · fixed in 9.0.5-00
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
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Questions about CVE-2026-91759
Is CVE-2026-91759 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The bug is an out-of-bounds write, meaning data can be written outside the memory area intended for it. The CVSS vector rates the confidentiality, integrity and availability impact as high.Source: hitachi.com
Which versions are affected by CVE-2026-91759?
Hitachi Dynamic Link Manager for Linux: from 7.5.0-00 before 9.0.5-00.Source: cve.now feed data
Am I affected, and how do I check?
The affected range is Hitachi Dynamic Link Manager for Linux versions 7.5.0-00 to 9.0.3-01. To check an installed version, look at the Dynamic Link Manager for Linux version reported by the product on the system.Source: hitachi.com
How do I fix CVE-2026-91759?
Upgrade to version 9.0.5-00 or later, which is the fixed version in the range data. The facts provided do not include a separate vendor fix advisory or workaround.Source: hitachi.com