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NTAP-20260527-0014 — CVE-2017-1000405 Linux Kernel Vulnerability in NetApp Products

Published 2026-05-27 · Updated 2026-08-05 · Status: Interim · Exploitation: Public · Severity: HIGH 7.0 · ONTAP affected: Yes

Official advisory: NTAP-20260527-0014 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP · E-Series / SANtricity · Cloud Backup / AltaVault / SteelStore · OnCommand family · Other NetApp products · StorageGRID · NetApp Console / BlueXP · SolidFire / NetApp HCI | ONTAP-relevant | highest CVSS: 7.0

CVEs in this advisory

CVE-2017-1000405 — HIGH · CVSS 7.0 · site index

What the CVE records say

CVE-2017-1000405 — The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original "Dirty cow" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp.

Impact

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

Affected products

Data ONTAP Edge
E-Series SANtricity OS Controller Software
NetApp Cloud Backup (formerly AltaVault)
NetApp VASA Provider for Clustered Data ONTAP 6.x
ONTAP Select Deploy administration utility
OnCommand Balance
SnapProtect
StorageGRID (formerly StorageGRID Webscale)
NetApp Console Agent OVA
NetApp SolidFire & HCI Management Node

Official fixes

E-Series SANtricity OS Controller Software — vendor fix ↗
NetApp Cloud Backup (formerly AltaVault) — vendor fix ↗
NetApp Cloud Backup (formerly AltaVault) — vendor fix ↗
NetApp Cloud Backup (formerly AltaVault) — vendor fix ↗
ONTAP Select Deploy administration utility — vendor fix ↗
StorageGRID (formerly StorageGRID Webscale) — vendor fix ↗

References

https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0 ↗

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.