---
id: CVE-2026-98614
title: 'sctp: avoid livelock while updating retransmit path'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  sctp: avoid livelock while updating retransmit path

  sctp_assoc_update_retran_path() can loop forever when every remaining
  transport, including retran_path, is SCTP_UNC…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    3fe624c3843694ab096fdb198526ba0c659febbe
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    43410c1f2db53516e95ddd7e5b4b02f495b78121
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    83b1a7f9e718828ef364a7b004254ebb2d0035fe
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    173610fff55022a5ad1579fbcc7faa97467b58b7
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    c9338057df1025f578fe7d0ff08bada87b8b838d
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    ddc34cc0834c873871e88b055ee6a260676efe97
  - >-
    Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 <
    d2c31b837406395e576afeb25958c98e9938f3f6
  - Linux 8ceaec02b17397d12719a282945abc95f8149d9f
  - Linux d2c2bdcdd8c5ce3d2a68aa3353ed1f340c3e500e
  - Linux >= 3.10.106 < 3.11
  - Linux >= 3.12.71 < 3.13
  - Linux 3.14
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:19:34.494Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98614'
references:
  - url: 'https://git.kernel.org/stable/c/3fe624c3843694ab096fdb198526ba0c659febbe'
  - url: 'https://git.kernel.org/stable/c/43410c1f2db53516e95ddd7e5b4b02f495b78121'
  - url: 'https://git.kernel.org/stable/c/d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49'
  - url: 'https://git.kernel.org/stable/c/83b1a7f9e718828ef364a7b004254ebb2d0035fe'
  - url: 'https://git.kernel.org/stable/c/173610fff55022a5ad1579fbcc7faa97467b58b7'
  - url: 'https://git.kernel.org/stable/c/c9338057df1025f578fe7d0ff08bada87b8b838d'
  - url: 'https://git.kernel.org/stable/c/ddc34cc0834c873871e88b055ee6a260676efe97'
  - url: 'https://git.kernel.org/stable/c/d2c31b837406395e576afeb25958c98e9938f3f6'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.240Z'
---

## Overview

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

sctp: avoid livelock while updating retransmit path

sctp_assoc_update_retran_path() can loop forever when every remaining
transport, including retran_path, is SCTP_UNCONFIRMED: the state check
runs before the wraparound test, so the loop cannot observe that it has
completed a full pass.

Fix this by considering a transport only when it is not UNCONFIRMED,
then checking whether the walk has returned to retran_path. This makes
the full-pass termination independent of the transport state while
preserving the existing fallback selection semantics.

Also restore the NULL guard around the retran_path assignment. In the
all-UNCONFIRMED case there is no eligible replacement transport, and
installing NULL would leave later retransmit-path users and the debug
print with a NULL path.

## Affected

- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < 3fe624c3843694ab096fdb198526ba0c659febbe`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < 43410c1f2db53516e95ddd7e5b4b02f495b78121`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < 83b1a7f9e718828ef364a7b004254ebb2d0035fe`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < 173610fff55022a5ad1579fbcc7faa97467b58b7`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < c9338057df1025f578fe7d0ff08bada87b8b838d`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < ddc34cc0834c873871e88b055ee6a260676efe97`
- `Linux >= 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0 < d2c31b837406395e576afeb25958c98e9938f3f6`
- `Linux 8ceaec02b17397d12719a282945abc95f8149d9f`
- `Linux d2c2bdcdd8c5ce3d2a68aa3353ed1f340c3e500e`
- `Linux >= 3.10.106 < 3.11`
- `Linux >= 3.12.71 < 3.13`
- `Linux 3.14`

## Remediation

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