---
id: CVE-2026-43213
title: 'wifi: rtw89: pci: validate sequence number of TX release report'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: rtw89: pci: validate sequence number of TX release report

  Hardware rarely reports abnormal sequence number in TX release report,
  which will access out-of-bounds …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <
    ef7fa19809b2d892d45da53f90ac698d13c367fd
  - >-
    Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <
    b342dd13aedccb0dd27365f6cc63a262f42394ce
  - >-
    Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <
    957eda596c7665f2966970fd1dcc35fe299b38e8
  - Linux 5.16
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:15:48.810008Z'
published: '2026-05-06'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:36.820Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43213'
references:
  - url: 'https://git.kernel.org/stable/c/ef7fa19809b2d892d45da53f90ac698d13c367fd'
  - url: 'https://git.kernel.org/stable/c/b342dd13aedccb0dd27365f6cc63a262f42394ce'
  - url: 'https://git.kernel.org/stable/c/957eda596c7665f2966970fd1dcc35fe299b38e8'
tags:
  - cve.org
epss: 0.00325
epssPercentile: 0.23949
ingestedAt: '2026-10-16T17:24:46.687Z'
---

## Overview

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

wifi: rtw89: pci: validate sequence number of TX release report

Hardware rarely reports abnormal sequence number in TX release report,
which will access out-of-bounds of wd_ring->pages array, causing NULL
pointer dereference.

  BUG: kernel NULL pointer dereference, address: 0000000000000000
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 0 P4D 0
  Oops: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 1 PID: 1085 Comm: irq/129-rtw89_p Tainted: G S   U
             6.1.145-17510-g2f3369c91536 #1 (HASH:69e8 1)
  Call Trace:
   <IRQ>
   rtw89_pci_release_tx+0x18f/0x300 [rtw89_pci (HASH:4c83 2)]
   rtw89_pci_napi_poll+0xc2/0x190 [rtw89_pci (HASH:4c83 2)]
   net_rx_action+0xfc/0x460 net/core/dev.c:6578 net/core/dev.c:6645 net/core/dev.c:6759
   handle_softirqs+0xbe/0x290 kernel/softirq.c:601
   ? rtw89_pci_interrupt_threadfn+0xc5/0x350 [rtw89_pci (HASH:4c83 2)]
   __local_bh_enable_ip+0xeb/0x120 kernel/softirq.c:499 kernel/softirq.c:423
   </IRQ>
   <TASK>
   rtw89_pci_interrupt_threadfn+0xf8/0x350 [rtw89_pci (HASH:4c83 2)]
   ? irq_thread+0xa7/0x340 kernel/irq/manage.c:0
   irq_thread+0x177/0x340 kernel/irq/manage.c:1205 kernel/irq/manage.c:1314
   ? thaw_kernel_threads+0xb0/0xb0 kernel/irq/manage.c:1202
   ? irq_forced_thread_fn+0x80/0x80 kernel/irq/manage.c:1220
   kthread+0xea/0x110 kernel/kthread.c:376
   ? synchronize_irq+0x1a0/0x1a0 kernel/irq/manage.c:1287
   ? kthread_associate_blkcg+0x80/0x80 kernel/kthread.c:331
   ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
   </TASK>

To prevent crash, validate rpp_info.seq before using.

## Affected

- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < ef7fa19809b2d892d45da53f90ac698d13c367fd`
- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < b342dd13aedccb0dd27365f6cc63a262f42394ce`
- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < 957eda596c7665f2966970fd1dcc35fe299b38e8`
- `Linux 5.16`

## Remediation

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