---
id: CVE-2026-97442
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi

  In certain cases, hardware might provide packets with a
  length greater than the maximum native Wi…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi

  In certain cases, hardware might provide packets with a
  length greater than the maximum native Wi…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= acc79d981c1462b22a7a2cb0d39725f8c01fc425 <
    958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c
  - >-
    Linux >= acc79d981c1462b22a7a2cb0d39725f8c01fc425 <
    b4ef30f1d107aae460edf731a7c2d187fbc46a32
  - >-
    Linux >= acc79d981c1462b22a7a2cb0d39725f8c01fc425 <
    1c0a13be76db3c1cf774aa11d9f4c3f8239ac567
  - >-
    Linux >= acc79d981c1462b22a7a2cb0d39725f8c01fc425 <
    00738665c875ab34efa7126ea63c9d70b48ee169
  - >-
    Linux >= acc79d981c1462b22a7a2cb0d39725f8c01fc425 <
    6b471e9aefee9ed73278eb1141e0d8530a56fae9
  - Linux 5.7
published: '2026-09-24'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:55.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97442'
references:
  - url: 'https://git.kernel.org/stable/c/00738665c875ab34efa7126ea63c9d70b48ee169'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1c0a13be76db3c1cf774aa11d9f4c3f8239ac567'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6b471e9aefee9ed73278eb1141e0d8530a56fae9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b4ef30f1d107aae460edf731a7c2d187fbc46a32'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97442.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97442'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2540412'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97442'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97442'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97442.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00254
epssPercentile: 0.16801
scores:
  nvd: 8.8
  vendor: 5.5
ingestedAt: '2026-09-24T16:47:15.878Z'
---

## Overview

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

wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi

In certain cases, hardware might provide packets with a
length greater than the maximum native Wi-Fi header length.
This can lead to accessing and modifying fields in the header
within the ath11k_dp_rx_h_undecap_nwifi() function for the
DP_RX_DECAP_TYPE_NATIVE_WIFI decap type and
potentially result in invalid data access and memory corruption.

Kernel stack is corrupted in: ath11k_dp_rx_h_undecap+0x6b0/0x6b0 [ath11k]
Call trace:
 ath11k_dp_rx_h_mpdu+0x0/0x2e8 [ath11k]
 ath11k_dp_rx_h_mpdu+0x1e0/0x2e8 [ath11k]
 ath11k_dp_rx_wbm_err+0x1e0/0x450 [ath11k]
 ath11k_dp_rx_process_wbm_err+0x2fc/0x460 [ath11k]
 ath11k_dp_service_srng+0x2e0/0x348 [ath11k]

Add a sanity check before processing the SKB to prevent invalid
data access in the undecap native Wi-Fi function for the
DP_RX_DECAP_TYPE_NATIVE_WIFI decap type.

This adapted from the discussion/patch of the ath12k driver [1].

Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97442.json)