---
id: CVE-2025-38201
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

  Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof()
  when resizing hashtable b…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

  Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof()
  when resizing hashtable b…
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'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.6, < 6.12.35'
  - 'linux_kernel >= 6.13, < 6.15.4'
patched:
  - linux_kernel 6.15.4
published: '2025-07-04'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:17:52.223'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38201'
references:
  - url: 'https://git.kernel.org/stable/c/0ab3de047808f375a36cd345225572eb3366f3c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1fe27f97944017a9d3c5af4d6d95282bff0f1147'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4abccfb61f422300be014b8e734c63344306f009'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/80417057ac60dd80f4816eb426e4e4a5bf696534'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b85e3367a5716ed3662a4fe266525190d2af76df'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d2768016f091f8a5264076b433fd7c3fabb6eb97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df524a68d9021c1401965d610bb6e42ee5d9611e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-082556.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00235
epssPercentile: 0.14403
ingestedAt: '2026-09-08T15:33:26.997Z'
---

## Overview

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

netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX

Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof()
when resizing hashtable because __GFP_NOWARN is unset.

Similar to:

  b541ba7d1f5a ("netfilter: conntrack: clamp maximum hashtable size to INT_MAX")

## Affected

- `linux_kernel >= 5.6, < 6.12.35`
- `linux_kernel >= 6.13, < 6.15.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.15.4`