---
id: CVE-2024-0639
title: >-
  A denial of service vulnerability due to a deadlock was found in
  sctp_auto_asconf_init in net/sctp/socket.c in the Linux kernel’s SCTP
  subsystem
summary: >-
  A denial of service vulnerability due to a deadlock was found in
  sctp_auto_asconf_init in net/sctp/socket.c in the Linux kernel’s SCTP
  subsystem. This flaw allows guests with local user privileges to trigger a
  deadlock and potentially cr…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-833
  - CWE-667
vendor: linux
product: linux_kernel
affected:
  - linux_kernel <= 6.4.16
  - enterprise_linux = 8.0
  - enterprise_linux = 9.0
published: '2024-01-17'
updated: '2026-07-21'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-0639'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:6583'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2024-0639'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2258754'
    label: secalert@redhat.com
  - url: >-
      https://github.com/torvalds/linux/commit/6feb37b3b06e9049e20dcf7e23998f92c9c5be9a
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2024-0639'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2258754'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/torvalds/linux/commit/6feb37b3b06e9049e20dcf7e23998f92c9c5be9a
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00176
epssPercentile: 0.06426
ingestedAt: '2026-07-21T19:53:39.261Z'
---

## Overview

A denial of service vulnerability due to a deadlock was found in sctp_auto_asconf_init in net/sctp/socket.c in the Linux kernel’s SCTP subsystem. This flaw allows guests with local user privileges to trigger a deadlock and potentially crash the system.

## Affected

- `linux_kernel <= 6.4.16`
- `enterprise_linux = 8.0`
- `enterprise_linux = 9.0`

## Remediation

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