---
id: CVE-2026-116572
title: >-
  FreeSWITCH mod_sofia: stack buffer overflow from an over-long SIP Contact
  display-name
summary: "FreeSWITCH is an open-source software telecommunications platform. From 1.10.0 to 1.11.1, there is a stack-based buffer overflow in \_mod_sofia\_ when processing SIP Contact display names for dialog-event notifications. A peer can establis…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-121
  - CWE-787
vendor: signalwire
product: freeswitch
affected:
  - freeswitch < 1.11.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:08:17.276683Z'
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:11:44.411Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116572'
references:
  - url: >-
      https://github.com/signalwire/freeswitch/security/advisories/GHSA-xrp9-7wv5-xr8c
    label: >-
      https://github.com/signalwire/freeswitch/security/advisories/GHSA-xrp9-7wv5-xr8c
  - url: >-
      https://github.com/signalwire/freeswitch/commit/21d8a78fbcdb303f9bb03155631a2ed963fdca8a
    label: >-
      https://github.com/signalwire/freeswitch/commit/21d8a78fbcdb303f9bb03155631a2ed963fdca8a
  - url: 'https://github.com/signalwire/freeswitch/releases/tag/v1.11.2'
    label: 'https://github.com/signalwire/freeswitch/releases/tag/v1.11.2'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.990Z'
---

## Overview

FreeSWITCH is an open-source software telecommunications platform. From 1.10.0 to 1.11.1, there is a stack-based buffer overflow in  mod_sofia  when processing SIP Contact display names for dialog-event notifications. A peer can establish a dialog containing an excessively long display name and subsequently subscribe to that entity’s dialog events, causing the stored value to overflow a fixed 512-byte stack buffer. Exploitation requires presence management to be enabled, directly or through shared appearance, and normally requires valid profile credentials unless subscription authentication is disabled. The overflow can terminate the FreeSWITCH process and all active calls. This vulnerability is fixed in version 1.11.2.

## Affected

- `freeswitch < 1.11.2`

## Remediation

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