---
id: CVE-2026-93076
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dax/fsdev: clear vmemmap_shift when binding static pgmap

  Clear pgmap->vmemmap_shift for static DAX devices
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dax/fsdev: clear vmemmap_shift when binding static pgmap

  Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static
  device from device_dax (which may s…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d5406bd458b0ac10b1301a4d5801d85c8f648637 <
    d298a0513aaf7d48f2a9f4a90041de910750cfcf
  - >-
    Linux >= d5406bd458b0ac10b1301a4d5801d85c8f648637 <
    e0239229931faf9ca3367e3befcf16f77b2cd45b
  - Linux 7.1
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:01.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93076'
references:
  - url: 'https://git.kernel.org/stable/c/d298a0513aaf7d48f2a9f4a90041de910750cfcf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e0239229931faf9ca3367e3befcf16f77b2cd45b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.763Z'
epss: 0.00155
epssPercentile: 0.05112
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

dax/fsdev: clear vmemmap_shift when binding static pgmap

Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static
device from device_dax (which may set vmemmap_shift based on alignment) to
fsdev_dax, the stale vmemmap_shift persists on the shared pgmap. Explicitly
zero it before devm_memremap_pages() so the vmemmap is built for order-0
folios as fsdev requires.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.