---
id: CVE-2026-98571
title: >-
  kernel: net: stmmac: clear stale buf->page after recycling on skb build
  failure (CVE-2026-98571)
summary: >-
  A flaw was found in the Linux kernel's stmmac network driver. This
  vulnerability can lead to a Denial of Service (DoS) or memory corruption when
  processing incoming network traffic under resource constraints. When the
  driver fails to alloc…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= df542f669307918f054a17878ff6dd1ddbb2fe18 <
    501baaeca7d128fa0a2f6953cf5873c5b0d7cf89
  - >-
    Linux >= df542f669307918f054a17878ff6dd1ddbb2fe18 <
    298673397ea3f6f5811b84f0d9f71eac71dda2e3
  - >-
    Linux >= df542f669307918f054a17878ff6dd1ddbb2fe18 <
    0a7822e34a0bfde31b194ac3da3253e5032b44cc
  - Linux 6.14
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T03:13:29+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98571.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98571.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98571'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554916'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98571'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98571'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98571.mbox
  - url: 'https://git.kernel.org/stable/c/501baaeca7d128fa0a2f6953cf5873c5b0d7cf89'
  - url: 'https://git.kernel.org/stable/c/298673397ea3f6f5811b84f0d9f71eac71dda2e3'
  - url: 'https://git.kernel.org/stable/c/0a7822e34a0bfde31b194ac3da3253e5032b44cc'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00198
epssPercentile: 0.09495
ingestedAt: '2026-10-18T15:45:12.257Z'
---

## Overview

A flaw was found in the Linux kernel's stmmac network driver. This vulnerability can lead to a Denial of Service (DoS) or memory corruption when processing incoming network traffic under resource constraints. When the driver fails to allocate a network packet buffer, it recycles the underlying memory page without clearing its reference pointer. An attacker sending network packets during memory pressure could trigger this condition, causing the driver to reuse the recycled memory page and crash the system.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98571.json)

**kernel: net: stmmac: clear stale buf->page after recycling on skb build failure** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.