---
id: CVE-2023-52502
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

  Sili Luo reported a race in nfc_llcp_sock_get(), leading to UAF.

  Getting a reference on the sock…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

  Sili Luo reported a race in nfc_llcp_sock_get(), leading to UAF.

  Getting a reference on the sock…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-362
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.6, < 4.19.297'
  - 'linux_kernel >= 4.20, < 5.4.259'
  - 'linux_kernel >= 5.5, < 5.10.199'
  - 'linux_kernel >= 5.11, < 5.15.136'
  - 'linux_kernel >= 5.16, < 6.1.59'
  - 'linux_kernel >= 6.2, < 6.5.8'
  - linux_kernel = 6.6
patched:
  - linux_kernel 6.5.8
published: '2024-03-02'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-52502'
references:
  - url: 'https://git.kernel.org/stable/c/31c07dffafce914c1d1543c135382a11ff058d93'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7adcf014bda16cdbf804af5c164d94d5d025db2d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d888d3f70b0de32b4f51534175f039ddab15eef8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e863f5720a5680e50c4cecf12424d7cc31b3eb0a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/31c07dffafce914c1d1543c135382a11ff058d93'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/7adcf014bda16cdbf804af5c164d94d5d025db2d'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/d888d3f70b0de32b4f51534175f039ddab15eef8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/e863f5720a5680e50c4cecf12424d7cc31b3eb0a'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00247
epssPercentile: 0.14185
ingestedAt: '2026-08-04T10:39:39.979Z'
---

## Overview

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

net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

Sili Luo reported a race in nfc_llcp_sock_get(), leading to UAF.

Getting a reference on the socket found in a lookup while
holding a lock should happen before releasing the lock.

nfc_llcp_sock_get_sn() has a similar problem.

Finally nfc_llcp_recv_snl() needs to make sure the socket
found by nfc_llcp_sock_from_sn() does not disappear.

## Affected

- `linux_kernel >= 3.6, < 4.19.297`
- `linux_kernel >= 4.20, < 5.4.259`
- `linux_kernel >= 5.5, < 5.10.199`
- `linux_kernel >= 5.11, < 5.15.136`
- `linux_kernel >= 5.16, < 6.1.59`
- `linux_kernel >= 6.2, < 6.5.8`
- `linux_kernel = 6.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.5.8`