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NTAP-20261023-0015 — CVE-2026-43304 Linux Kernel Vulnerability in NetApp Products

Published 2026-10-23 · Updated 2026-10-23 · Status: Interim · Exploitation: Public · Severity: CRITICAL 9.8 · ONTAP affected: Yes

Official advisory: NTAP-20261023-0015 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: Brocade SAN firmware · ONTAP · Other NetApp products · Baseboard management controllers · NetApp Console / BlueXP · SolidFire / NetApp HCI · SnapCenter | ONTAP-relevant | highest CVSS: 9.8

CVEs in this advisory

CVE-2026-43304 — CRITICAL · CVSS 9.8 · site index

What the CVE records say

CVE-2026-43304 — In the Linux kernel, the following vulnerability has been resolved: libceph: define and enforce CEPH_MAX_KEY_LEN When decoding the key, verify that the key material would fit into a fixed-size buffer in process_auth_done() and generally has a sane length. The new CEPH_MAX_KEY_LEN check replaces the existing check for a key with no key material which is a) not universal since CEPH_CRYPTO_NONE has to be excluded and b) doesn't provide much value since a smaller than needed key is just as invalid as no key -- this has to be handled elsewhere anyway.

Impact

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

Affected products

Brocade Fabric Operating System Firmware
Cloud Volumes ONTAP Mediator
FAS/AFF BIOS - A900/9500
FAS/AFF Baseboard Management Controller (BMC) - A250/500f/C250
NetApp Console Agent OVA
NetApp HCI Baseboard Management Controller (BMC) - H610S
NetApp SolidFire & HCI Management Node
ONTAP tools for VMware vSphere 10
SnapCenter Plug-in for VMware vSphere
iNetApp SolidFire & HCI Storage Node (Element Software)

References

https://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43304-a225@gregkh/ ↗

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.