---
id: CVE-2026-98028
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  eth: nfp: drop the replaced rule from the list when reprogramming fails

  nfp_net_fs_add() replaces an existing rule by deleting it from the
  hardware, decrementing nn->f…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  eth: nfp: drop the replaced rule from the list when reprogramming fails

  nfp_net_fs_add() replaces an existing rule by deleting it from the
  hardware, decrementing nn->f…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9eb03bb1c035ff6e2c3a34046419446588253dda <
    603b70093f729f52a37544b48679903cad834856
  - >-
    Linux >= 9eb03bb1c035ff6e2c3a34046419446588253dda <
    edaec279f59f801a05b751df475ed71a0a68c88a
  - >-
    Linux >= 9eb03bb1c035ff6e2c3a34046419446588253dda <
    552e528a7d85cbe088b2ae4f78194713975b46cf
  - >-
    Linux >= 9eb03bb1c035ff6e2c3a34046419446588253dda <
    108bb2142e3a12c9ad625ad662973127a113ddc6
  - Linux 6.8
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:31.447'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98028'
references:
  - url: 'https://git.kernel.org/stable/c/108bb2142e3a12c9ad625ad662973127a113ddc6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/552e528a7d85cbe088b2ae4f78194713975b46cf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/603b70093f729f52a37544b48679903cad834856'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/edaec279f59f801a05b751df475ed71a0a68c88a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98028.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98028'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541051'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98028'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98028'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98028.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-25T11:06:38.853Z'
epss: 0.00168
epssPercentile: 0.06031
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-459
---

## Overview

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

eth: nfp: drop the replaced rule from the list when reprogramming fails

nfp_net_fs_add() replaces an existing rule by deleting it from the
hardware, decrementing nn->fs.count and programming the new one.  If
nfp_net_fs_add_hw() fails the old entry stays on nn->fs.list - only the
success path reaches list_replace() - so the list is one longer than
nn->fs.count, and it advertises a rule whose hardware entry has already
been torn down.

nn->fs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes
its buffer one entry short of what the GRXCLSRLALL walk wants to write.
That used to overwrite one u32 past the allocation; since the walk is
bounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the
counter.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-28 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98028.json)