---
id: CVE-2026-98827
title: >-
  kernel: wifi: ath9k_htc: bound TX aggregation to MAX_TX_BUF_SIZE
  (CVE-2026-98827)
summary: >-
  A flaw was found in the Linux kernel's ath9k_htc wireless network driver. An
  attacker transmitting large network packets can trigger a Denial of Service
  (DoS) or system crash through memory corruption. This issue occurs because the
  driver …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-787
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T20:50:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98827.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98827.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98827'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555243'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98827'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98827'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98827.mbox
  - url: 'https://git.kernel.org/stable/c/c18882768a0fe253c70986c5fe66d9241570fbc4'
  - url: 'https://git.kernel.org/stable/c/345ce265cf604e84b5b560c21beaf4c6f269ab14'
  - url: 'https://git.kernel.org/stable/c/e73a619f91b6cfec47bc1a94aea28df6849e5be3'
  - url: 'https://git.kernel.org/stable/c/aeaca27c1db3106967ffbb2b517d98c835f6d500'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.002
epssPercentile: 0.09732
ingestedAt: '2026-10-18T16:47:32.472Z'
---

## Overview

A flaw was found in the Linux kernel's ath9k_htc wireless network driver. An attacker transmitting large network packets can trigger a Denial of Service (DoS) or system crash through memory corruption. This issue occurs because the driver limits aggregated transmit packets only by count rather than cumulative data size, causing a buffer overflow when copying oversized network frames into a fixed-size buffer.

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98827.json)

**kernel: wifi: ath9k_htc: bound TX aggregation to MAX_TX_BUF_SIZE** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

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

No fix planned:

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

## Remediation

Out of support scope