---
id: CVE-2025-38095
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dma-buf: insert memory barrier before updating num_fences

  smp_store_mb() inserts memory barrier after storing operation.
  It is different with what the comment is origi…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dma-buf: insert memory barrier before updating num_fences

  smp_store_mb() inserts memory barrier after storing operation.
  It is different with what the comment is origi…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-476
  - CWE-821
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.0, < 5.10.241'
  - 'linux_kernel >= 5.11, < 5.15.192'
  - 'linux_kernel >= 5.16, < 6.1.140'
  - 'linux_kernel >= 6.2, < 6.6.92'
  - 'linux_kernel >= 6.7, < 6.12.30'
  - 'linux_kernel >= 6.13, < 6.14.8'
  - linux_kernel = 6.15
  - debian_linux = 11.0
patched:
  - linux_kernel 6.14.8
published: '2025-07-03'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:26.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38095'
references:
  - url: 'https://git.kernel.org/stable/c/08680c4dadc6e736c75bc2409d833f03f9003c51'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3becc659f9cb76b481ad1fb71f54d5c8d6332d3f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/72c7d62583ebce7baeb61acce6057c361f73be4a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c9d2b9a80d06a58f37e0dc8c827075639b443927'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0b7f11dd68b593bd970e5735be00e8d89bace30'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fe1bebd0edb22e3536cbc920ec713331d1367ad4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38095.json
  - url: 'https://access.redhat.com/security/cve/CVE-2025-38095'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2376026'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2025-38095'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38095'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2025070340-CVE-2025-38095-6596@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0021
epssPercentile: 0.1115
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:47:18.378470Z'
scores:
  nvd: 7.8
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-10-15T22:48:25.492Z'
---

## Overview

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

dma-buf: insert memory barrier before updating num_fences

smp_store_mb() inserts memory barrier after storing operation.
It is different with what the comment is originally aiming so Null
pointer dereference can be happened if memory update is reordered.

## Affected

- `linux_kernel >= 5.0, < 5.10.241`
- `linux_kernel >= 5.11, < 5.15.192`
- `linux_kernel >= 5.16, < 6.1.140`
- `linux_kernel >= 6.2, < 6.6.92`
- `linux_kernel >= 6.7, < 6.12.30`
- `linux_kernel >= 6.13, < 6.14.8`
- `linux_kernel = 6.15`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.8`

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38095.json)