---
id: CVE-2026-98575
title: 'nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()

  frame->ccid.datalen is read directly from the USB response frame
  and used, unchecked, as an index into fra…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    8db3b1e012a8b25078dfa1efabe3d0cd2916dcba
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    74b3fbc60907ee97e3af3249091f57351b53a6d6
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    8a0f1bb790d964893db7fc59febda9a534db07b3
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    ea82b7576793219fa10a8b545f8338998b2a9ce2
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    72b8b2126e854d6756a1aa4bdc66d7457b832294
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    e72cbedc4596e808d22dd2b9fff666ece76f8dd6
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    2450a388367231fb7dd798538f393af227c00c4d
  - >-
    Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <
    b61732f47316d45f27706db7812950145d3327b5
  - Linux 4.7
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:18:40.577Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98575'
references:
  - url: 'https://git.kernel.org/stable/c/8db3b1e012a8b25078dfa1efabe3d0cd2916dcba'
  - url: 'https://git.kernel.org/stable/c/74b3fbc60907ee97e3af3249091f57351b53a6d6'
  - url: 'https://git.kernel.org/stable/c/8a0f1bb790d964893db7fc59febda9a534db07b3'
  - url: 'https://git.kernel.org/stable/c/ea82b7576793219fa10a8b545f8338998b2a9ce2'
  - url: 'https://git.kernel.org/stable/c/72b8b2126e854d6756a1aa4bdc66d7457b832294'
  - url: 'https://git.kernel.org/stable/c/e72cbedc4596e808d22dd2b9fff666ece76f8dd6'
  - url: 'https://git.kernel.org/stable/c/2450a388367231fb7dd798538f393af227c00c4d'
  - url: 'https://git.kernel.org/stable/c/b61732f47316d45f27706db7812950145d3327b5'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.255Z'
---

## Overview

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

nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()

frame->ccid.datalen is read directly from the USB response frame
and used, unchecked, as an index into frame->data[]. A malicious or
malfunctioning device can set this field to an arbitrary value,
causing the driver to read far outside the received buffer.

Bound ccid.datalen against the maximum possible ACR122 frame size
before using it. This replaces the existing datalen == 0 check,
since datalen < 2 already covers that case and additionally
rejects datalen == 1, which would still underflow the
"datalen - 2" offset used below.

## Affected

- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < 8db3b1e012a8b25078dfa1efabe3d0cd2916dcba`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < 74b3fbc60907ee97e3af3249091f57351b53a6d6`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < 8a0f1bb790d964893db7fc59febda9a534db07b3`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < ea82b7576793219fa10a8b545f8338998b2a9ce2`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < 72b8b2126e854d6756a1aa4bdc66d7457b832294`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < e72cbedc4596e808d22dd2b9fff666ece76f8dd6`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < 2450a388367231fb7dd798538f393af227c00c4d`
- `Linux >= 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc < b61732f47316d45f27706db7812950145d3327b5`
- `Linux 4.7`

## Remediation

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