---
id: CVE-2026-98562
title: 'kernel: net: libwx: fix races in Tx timestamp handling (CVE-2026-98562)'
summary: >-
  A flaw was found in the Linux kernel's Wangxun network driver library (libwx).
  This vulnerability allows a local user to cause a Denial of Service (DoS)
  through memory corruption. A race condition in the Precision Time Protocol
  (PTP) trans…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-366
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 06e75161b9d4833518a7c266310a0635eab50616 <
    e78b95cfd5df25d0c562aaef95d3c7fe6c7e0e66
  - >-
    Linux >= 06e75161b9d4833518a7c266310a0635eab50616 <
    3173cba1170131816972ed2b6185cb970ba8b747
  - Linux 6.15
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T02:26:24+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98562.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98562.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98562'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554995'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98562'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98562'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98562.mbox
  - url: 'https://git.kernel.org/stable/c/e78b95cfd5df25d0c562aaef95d3c7fe6c7e0e66'
  - url: 'https://git.kernel.org/stable/c/3173cba1170131816972ed2b6185cb970ba8b747'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00189
epssPercentile: 0.08508
ingestedAt: '2026-10-18T15:45:12.259Z'
---

## Overview

A flaw was found in the Linux kernel's Wangxun network driver library (libwx). This vulnerability allows a local user to cause a Denial of Service (DoS) through memory corruption. A race condition in the Precision Time Protocol (PTP) transmit timestamp handling fails to properly synchronize packet transmission and cleanup routines. By transmitting network packets configured for hardware timestamping, an attacker can trigger this race condition, causing the system to access already freed memory and crash.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98562.json)

**kernel: net: libwx: fix races in Tx timestamp handling** — 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.