CVE-2022-29189Network attack vector

Service interruption via unbounded handshake buffering

Published May 20, 2022 · Updated Apr 23, 2025

Unbounded memory consumption in Pion DTLS before 2.1.4 allows remote attackers to interrupt service via an unterminated handshake. The fragmentBuffer.push path retains inbound DTLS handshake fragments without a cumulative size check until the handshake finishes or times out. No authentication or user interaction is required; sustained crafted traffic can exhaust process memory and disrupt any client or server embedding the library.

CVSS severity5.3
Medium
EPSS probability2.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unbounded memory consumption in Pion DTLS before 2.1.4 allows remote attackers to interrupt service via an unterminated handshake. The fragmentBuffer.push path retains inbound DTLS handshake fragments without a cumulative size check until the handshake finishes or times out. No authentication or user interaction is required; sustained crafted traffic can exhaust process memory and disrupt any client or server embedding the library.

The record

CVE
CVE-2022-29189
Published
May 20, 2022
Updated
Apr 23, 2025
Vendor
Pion
Product
Pion DTLS
Classifications
CWE-120, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pion · Pion DTLSversion=< 2.1.4

Published CVSS scores

5.0NISTAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.3NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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