---
id: "CVE-2026-98579"
kind: "vulnerability"
aliases: ["CVE-2026-98579"]
title: "Linux kernel NFC LLCP: memory leak on SDREQ error paths"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "linux-kernel", "nfc"]
not_affected_if: ["nfc-disabled"]
published_at: "2026-10-18T16:17:10+00:00"
first_seen_at: "2026-10-23T21:57:15+00:00"
updated_at: "2026-10-25T05:23:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98579", "first_seen_at": "2026-10-23T21:57:15+00:00"}]
---

# Linux kernel NFC LLCP: memory leak on SDREQ error paths

In the Linux kernel's NFC LLCP code, three error paths in the service-discovery request handler skip freeing already-queued TLV nodes, leaking kernel memory. The sources describe a leak, not code execution or data exposure.

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

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98579

## From the sources

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

nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure

nfc_genl_llc_sdreq() builds a list of TLV nodes while walking nested
netlink attrs, but 3 error paths (nested-attr parse failure, TLV alloc
ENOMEM, nfc_llcp_send_snl_sdreq() failure) all skip freeing what was
already queued.

Route them through a new free_list label, mirroring the SDRES path in
the same file which already does this. Harmless on the success path
too -- send_snl_sdreq() drains the list as it moves nodes, so it's
already empty by the time free_list runs.

---

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