---
id: CVE-2024-53122
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

  Additional active subflows - i.e
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

  Additional active subflows - i.e. created by the in kernel path
  manager - are included into the subflow l…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.10, < 6.1.119'
  - 'linux_kernel >= 6.2, < 6.6.63'
  - 'linux_kernel >= 6.7, < 6.11.10'
  - linux_kernel = 6.12
patched:
  - linux_kernel 6.11.10
published: '2024-12-02'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:17:59.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-53122'
references:
  - url: 'https://git.kernel.org/stable/c/0a9a182ea5c7bb0374e527130fd85024ace7279b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/24995851d58c4a205ad0ffa7b2f21e479a9c8527'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aad6412c63baa39dd813e81f16a14d976b3de2e8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ce7356ae35943cc6494cc692e62d51a734062b7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ff825ab2f455299c0c7287550915a8878e2a66e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00528
epssPercentile: 0.44475
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:40:37.811041Z'
ingestedAt: '2026-10-15T22:48:25.441Z'
---

## Overview

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

mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

Additional active subflows - i.e. created by the in kernel path
manager - are included into the subflow list before starting the
3whs.

A racing recvmsg() spooling data received on an already established
subflow would unconditionally call tcp_cleanup_rbuf() on all the
current subflows, potentially hitting a divide by zero error on
the newly created ones.

Explicitly check that the subflow is in a suitable state before
invoking tcp_cleanup_rbuf().

## Affected

- `linux_kernel >= 5.10, < 6.1.119`
- `linux_kernel >= 6.2, < 6.6.63`
- `linux_kernel >= 6.7, < 6.11.10`
- `linux_kernel = 6.12`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.11.10`