---
id: CVE-2026-89478
title: 'kernel: sctp: drop a chunk if its transport was removed (CVE-2026-89478)'
summary: >-
  A flaw was found in the Linux kernel's Stream Control Transmission Protocol
  (SCTP) implementation. An authenticated attacker could exploit a timing window
  during the removal of an SCTP transport. This could lead to the system
  attempting to…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T12:24:08+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89478'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532439'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89478'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89478'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89478.mbox
  - url: 'https://git.kernel.org/stable/c/3fc072e7cb4a0ff251d13cfc2d24f62489cd9386'
  - url: 'https://git.kernel.org/stable/c/d7cb5ad832095dc4becfdb2a36007ffd50e49fb0'
  - url: 'https://git.kernel.org/stable/c/0422b092a3d43ca462932ff9f747731ca078d1d4'
  - url: 'https://git.kernel.org/stable/c/928fd7920ba37cc5637a211b9be979083413a2fa'
  - url: 'https://git.kernel.org/stable/c/c6c86a5e62a4fec36692ddd64b9144b660f71f96'
  - url: 'https://git.kernel.org/stable/c/1035bdef1efb9b1076d1a57b81e08c637ff08ecc'
  - url: 'https://git.kernel.org/stable/c/3537961df2163258bddc230db0e18dc14e925ea6'
  - url: 'https://git.kernel.org/stable/c/03a9d10ecf71f54b2af8020935f2033d4a132be5'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00755
epssPercentile: 0.53104
scores:
  vendor: 7
  cna: 9.8
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. An authenticated attacker could exploit a timing window during the removal of an SCTP transport. This could lead to the system attempting to read from freed memory, potentially causing a denial of service or information disclosure.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json)

**kernel: sctp: drop a chunk if its transport was removed** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope