---
id: "CVE-2026-98583"
kind: "vulnerability"
aliases: ["CVE-2026-98583"]
title: "Linux kernel: NFC Marvell driver reads short firmware frames unchecked"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "linux-kernel", "marvell-nfc", "nfc-hardware"]
not_affected_if: ["nfcmrvl-not-loaded", "no-marvell-nfc-hardware"]
published_at: "2026-10-18T16:17:10+00:00"
first_seen_at: "2026-10-23T21:57:15+00:00"
updated_at: "2026-10-25T05:23:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98583", "first_seen_at": "2026-10-23T21:57:15+00:00"}]
---

# Linux kernel: NFC Marvell driver reads short firmware frames unchecked

The Linux kernel's nfcmrvl NFC driver strips the NCI data header and reads a helper command before checking the packet length, so a short malformed frame can be read past its bounds. The sources do not state what an attacker gains beyond this out-of-bounds read.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `uname -r` and compare against the fixed kernel versions listed in the NVD entry.
- Check whether the nfcmrvl NFC driver is loaded with `lsmod | grep nfcmrvl`.
- unknown for other checks; the sources do not say.

## Fix

- Update the Linux kernel to a release that includes the nfcmrvl length validation fix; the exact version is unknown from the sources.
- Until patched, unload the driver with `modprobe -r nfcmrvl` if NFC hardware is not in use.

## Timeline

- 2026-10-23T21:57:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98583

## From the sources

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

nfc: nfcmrvl: validate helper command length before pull

The firmware download receive path removes the NCI data header and
reads the helper command before validating the remaining packet length.
A short frame can therefore reach the data access before the malformed
packet is rejected.

Validate the complete helper command length before stripping the NCI
data header.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_