---
id: CVE-2026-98604
title: 'ovpn: replace bind when learning local endpoint'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ovpn: replace bind when learning local endpoint

  struct ovpn_bind is published through peer->bind with RCU, but local
  endpoint learning updates bind->local in place und…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e <
    21dbc9f4d0bdd3b22f91beabc7840064bf11594f
  - >-
    Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e <
    e283009151d3d131447c2edda500199c5fda5f72
  - >-
    Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e <
    aea934a221ec6a867221e5b765f65f1857befd53
  - Linux 6.16
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:19:17.227Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98604'
references:
  - url: 'https://git.kernel.org/stable/c/21dbc9f4d0bdd3b22f91beabc7840064bf11594f'
  - url: 'https://git.kernel.org/stable/c/e283009151d3d131447c2edda500199c5fda5f72'
  - url: 'https://git.kernel.org/stable/c/aea934a221ec6a867221e5b765f65f1857befd53'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.247Z'
---

## Overview

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

ovpn: replace bind when learning local endpoint

struct ovpn_bind is published through peer->bind with RCU, but local
endpoint learning updates bind->local in place under peer->lock. UDP TX
reads the field without that lock. In particular, a concurrent IPv6
update can therefore result in a torn address read.

Use ovpn_peer_reset_sockaddr to publish a replacement bind when learning
a new local endpoint, just as a remote endpoint change does. Preserve
the current remote address and reset the dst cache only after the new
bind has been published successfully.

Track remote endpoint changes separately so that float notification and
transport-address rehashing remain limited to actual peer floats.

## Affected

- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < 21dbc9f4d0bdd3b22f91beabc7840064bf11594f`
- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < e283009151d3d131447c2edda500199c5fda5f72`
- `Linux >= f0281c1d3732d1ec084fa1e06d1767d33e1a570e < aea934a221ec6a867221e5b765f65f1857befd53`
- `Linux 6.16`

## Remediation

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