---
id: CVE-2026-98578
title: 'kernel: nfc: st21nfca: validate ISO15693 inventory length (CVE-2026-98578)'
summary: >-
  A flaw was found in the Linux kernel's ST21NFCA Near Field Communication (NFC)
  driver. This vulnerability allows a Denial of Service (DoS) when the system
  encounters malformed wireless NFC responses. A nearby attacker with a crafted
  NFC de…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    e47b2a350bb0ff123434ec5484c6dc3333b0727c
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    57d183764f3002f9625ee4deeeb20716c519534e
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    3af2ea4035581a1607d9830779c187a0c7e225aa
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    9fa21b0f78adb514e3bd96a505ddb752e9727ff3
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    6353dae51bc9b3cad13c9d890b53311a46c96b4e
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    fdd95e819d828c975aaeb258a3fed5dd7fd136d0
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    a86987d03a4d39acdbe4533d83db4d656ea36c59
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    7f2ea5ed588c03d481f0301e6c3d4240132383fb
  - Linux 3.16
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T03:44:56+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98578'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554912'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98578'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98578'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98578.mbox
  - url: 'https://git.kernel.org/stable/c/e47b2a350bb0ff123434ec5484c6dc3333b0727c'
  - url: 'https://git.kernel.org/stable/c/57d183764f3002f9625ee4deeeb20716c519534e'
  - url: 'https://git.kernel.org/stable/c/3af2ea4035581a1607d9830779c187a0c7e225aa'
  - url: 'https://git.kernel.org/stable/c/9fa21b0f78adb514e3bd96a505ddb752e9727ff3'
  - url: 'https://git.kernel.org/stable/c/6353dae51bc9b3cad13c9d890b53311a46c96b4e'
  - url: 'https://git.kernel.org/stable/c/fdd95e819d828c975aaeb258a3fed5dd7fd136d0'
  - url: 'https://git.kernel.org/stable/c/a86987d03a4d39acdbe4533d83db4d656ea36c59'
  - url: 'https://git.kernel.org/stable/c/7f2ea5ed588c03d481f0301e6c3d4240132383fb'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00216
epssPercentile: 0.11998
ingestedAt: '2026-10-18T15:45:12.254Z'
---

## Overview

A flaw was found in the Linux kernel's ST21NFCA Near Field Communication (NFC) driver. This vulnerability allows a Denial of Service (DoS) when the system encounters malformed wireless NFC responses. A nearby attacker with a crafted NFC device can transmit a truncated ISO 15693 inventory response, which the driver processes without verifying minimum length requirements. This causes an out-of-bounds memory read, leading to a kernel crash.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json)

**kernel: nfc: st21nfca: validate ISO15693 inventory length** — 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.