---
id: CVE-2026-98576
title: 'nfc: llcp: fix slab-out-of-bounds reads when logging service names'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfc: llcp: fix slab-out-of-bounds reads when logging service names

  nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null-
  terminated strings to pr_debug() us…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    75f7c5a42fa1483f5912279a749417c284ad708f
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    6d4ca872830e46fcca9c086bf19fa9bd2faf09d2
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    a143f7835faa4fe0178448289feea4f84eeee8d6
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    8afb6c194f5781798d3ab3edf243cf5a24a9d1f9
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    8978dff632519712d1fa432991e1f2e857f90239
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    4262b12277a3e056c95fc49e9c4d7bd97035d16c
  - >-
    Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 <
    7dcf371a35632f035baf77bcf2c129165f772ce4
  - Linux 3.10
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:18:41.629Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98576'
references:
  - url: 'https://git.kernel.org/stable/c/75f7c5a42fa1483f5912279a749417c284ad708f'
  - url: 'https://git.kernel.org/stable/c/6d4ca872830e46fcca9c086bf19fa9bd2faf09d2'
  - url: 'https://git.kernel.org/stable/c/a143f7835faa4fe0178448289feea4f84eeee8d6'
  - url: 'https://git.kernel.org/stable/c/75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b'
  - url: 'https://git.kernel.org/stable/c/8afb6c194f5781798d3ab3edf243cf5a24a9d1f9'
  - url: 'https://git.kernel.org/stable/c/8978dff632519712d1fa432991e1f2e857f90239'
  - url: 'https://git.kernel.org/stable/c/4262b12277a3e056c95fc49e9c4d7bd97035d16c'
  - url: 'https://git.kernel.org/stable/c/7dcf371a35632f035baf77bcf2c129165f772ce4'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.255Z'
---

## Overview

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

nfc: llcp: fix slab-out-of-bounds reads when logging service names

nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null-
terminated strings to pr_debug() using the %s format specifier.
The buffers are allocated via kmemdup() or come from netlink
attributes and are not guaranteed to be null-terminated, causing
__dynamic_pr_debug() to read beyond the allocated region:

  KASAN: slab-out-of-bounds Read in __dynamic_pr_debug

Fix both call sites by using %.*s with the explicit length to limit
the output to the actual length of the string.

## Affected

- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 75f7c5a42fa1483f5912279a749417c284ad708f`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 6d4ca872830e46fcca9c086bf19fa9bd2faf09d2`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < a143f7835faa4fe0178448289feea4f84eeee8d6`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 8afb6c194f5781798d3ab3edf243cf5a24a9d1f9`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 8978dff632519712d1fa432991e1f2e857f90239`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 4262b12277a3e056c95fc49e9c4d7bd97035d16c`
- `Linux >= d9b8d8e19b073096d3609bbd60f82148d128b555 < 7dcf371a35632f035baf77bcf2c129165f772ce4`
- `Linux 3.10`

## Remediation

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