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NTAP-20261023-0013 — CVE-2026-56392 GNU Coreutils Vulnerability in NetApp Products

Published 2026-10-23 · Updated 2026-10-23 · Status: Interim · Exploitation: Public · Severity: MEDIUM 6.1 · ONTAP affected: Yes

Official advisory: NTAP-20261023-0013 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: SolidFire / NetApp HCI · Brocade SAN firmware · Other NetApp products · NetApp Console / BlueXP · ONTAP · SnapCenter | ONTAP-relevant | highest CVSS: 6.1

CVEs in this advisory

CVE-2026-56392 — MEDIUM · CVSS 6.1 · site index

What the CVE records say

CVE-2026-56392 — GNU coreutils unexpand is vulnerable to a heap-based buffer overflow due to an integer overflow during buffer allocation when processing large tab stop (-t) values. The multiplication used to calculate the allocation size can wrap around, resulting in an undersized buffer. When processing crafted input, subsequent writes exceed the allocated memory, leading to an out‑of‑bounds heap write. When running GNU coreutils unexpand with attacker-provided large tab stop (-t) arguments, this behavior leads to a crash and potentially achieve a heap write primitive depending on memory layout. This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d

Impact

Successful exploitation of this vulnerability could lead to addition or modification of data or Denial of Service (DoS).

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H610S
Brocade Fabric Operating System Firmware
Element HealthTools
FAS/AFF BIOS - A900/9500
NetApp Console Agent
NetApp Console Agent Container (docker_occm)
NetApp Console Agent OVA
NetApp NFS Plug-in for VMware VAAI
NetApp SolidFire & HCI Management Node
NetApp XCP NFS
ONTAP tools for VMware vSphere 10
SnapCenter Plug-in for VMware vSphere

What to do

Check the affected products listed above against the official advisory's affected-versions table — that is where the exact ONTAP 9 release, ONTAP tool, or management product versions are named.
If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
Harden in parallel: security hardening baseline and ransomware protection on ONTAP.