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NTAP-20260925-0013 — CVE-2025-68823 Linux Kernel Vulnerability in NetApp Products

Published 2026-09-25 · Updated 2026-09-25 · Status: Interim · Exploitation: Public · Severity: MEDIUM 5.5 · ONTAP affected: Yes

Official advisory: NTAP-20260925-0013 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: SolidFire / NetApp HCI · Baseboard management controllers · Active IQ Unified Manager · Brocade SAN firmware · ONTAP · Other NetApp products · NetApp Console / BlueXP · SnapCenter | ONTAP-relevant | highest CVSS: 5.5

CVEs in this advisory

CVE-2025-68823 — MEDIUM · CVSS 5.5 · site index

What the CVE records say

CVE-2025-68823 — In the Linux kernel, the following vulnerability has been resolved: ublk: fix deadlock when reading partition table When one process(such as udev) opens ublk block device (e.g., to read the partition table via bdev_open()), a deadlock[1] can occur: 1. bdev_open() grabs disk->open_mutex 2. The process issues read I/O to ublk backend to read partition table 3. In __ublk_complete_rq(), blk_update_request() or blk_mq_end_request() runs bio->bi_end_io() callbacks 4. If this triggers fput() on file descriptor of ublk block device, the work may be deferred to current task's task work (see fput() implementation) 5. This eventually calls blkdev_release() from the same context 6. blkdev_release() tries to grab disk->open_mutex again 7. Deadlock: same task waiting for a mutex it already holds The fix is to run blk_update_request() and blk_mq_end_request() with bottom halves disabled. This forces blkdev_release() to run in kernel work-queue context instead of current task work context, and allows ublk server to make forward progress, and avoids the deadlock. [axboe: rewrite comment in ublk]

Impact

Successful exploitation of this vulnerability could lead to Denial of Service (DoS).

Affected products

NetApp HCI Baseboard Management Controller (BMC) - H610S
AFF Baseboard Management Controller (BMC) - A700s
Active IQ Unified Manager for VMware vSphere
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 SolidFire & HCI Management Node
NetApp SolidFire & HCI Storage Node (Element Software)
ONTAP tools for VMware vSphere 10
SnapCenter Plug-in for VMware vSphere

References

https://nvd.nist.gov/vuln/detail/CVE-2025-68823 ↗

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.