---
title: "CVE-2026-113380: Signal RingRTC - Denial of Service"
description: "Signal RingRTC library < 2.72.0 contains a denial of service caused by a peer saturating a call's FSM queue, letting attackers interfere with local hangup and call teardown, exploit requires a malicious peer."
url: https://panop.io/threat-heartbeat/CVE-2026-113380/
---

# CVE-2026-113380 Signal RingRTC - Denial of Service

Signal RingRTC library < 2.72.0 contains a denial of service caused by a peer saturating a call's FSM queue, letting attackers interfere with local hangup and call teardown, exploit requires a malicious peer.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-113380)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X

Published

20 October 2026

Updated

20 October 2026

Weakness

[CWE-754](https://cwe.mitre.org/data/definitions/754.html)

## Vendor fix

Update to version 2.72.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-113380](https://nvd.nist.gov/vuln/detail/CVE-2026-113380)
- [https://github.com/signalapp/ringrtc/commit/4b1b6fa53c9f30c87c8ea78e44675d4a13e1e4d3](https://github.com/signalapp/ringrtc/commit/4b1b6fa53c9f30c87c8ea78e44675d4a13e1e4d3)
- [https://github.com/signalapp/ringrtc/compare/v2.71.0...v2.72.0](https://github.com/signalapp/ringrtc/compare/v2.71.0...v2.72.0)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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