Out-of-Bounds Write in Hitachi Disk Array Driver for AIX (CVE-2026-86573)
Summary
Out-of-bounds write in Hitachi Disk Array Driver for AIX (CVE-2026-86573). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Out-of-bounds write vulnerability in Hitachi Disk Array Driver for AIX and Hitachi Disk Array Driver for Virtual I/O Server.
This issue affects Hitachi Disk Array Driver for AIX: from 01-00 before 01-23-/A; Hitachi Disk Array Driver for Virtual I/O Server: from 01-04 before 01-23-/A.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-86573 has been found in Hitachi Disk Array Driver for AIX.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Hitachi Disk Array Driver for AIX CVE-2026-86573" on the vendor's site.
CVE-2026-86573 (Hitachi Disk Array Driver for AIX) — CWE-787 / CVSS v3 5.1
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds write (CWE-787) exists in Hitachi Disk Array Driver for AIX.
Check the vendor advisory for the affected versions of Hitachi Disk Array Driver for AIX.
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Hitachi Disk Array Driver for AIX を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web hirt@hitachi.co.jp
- web nvd.nist.gov
- web github.com