How severe is CVE-2022-29189?

CVE-2022-29189 has a CVSS score of 5.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2022-29189?

CVE-2022-29189 affects the following packages: github.com/pion/dtls (Go), github.com/pion/dtls/v2 (Go). Ecosystems affected: Go.

How do I fix CVE-2022-29189?

Update github.com/pion/dtls to 2.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29189 is resolved across your whole dependency graph.

How do I detect CVE-2022-29189 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/pion/dtls, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-29189 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2022-29189 actively exploited in the wild?

No public exploit code has been indexed for CVE-2022-29189 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2022-29189?

CVE-2022-29189 has an EPSS (Exploit Prediction Scoring System) score of 2.1%, placing it in the 82th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-29189?

CVE-2022-29189 is classified as CWE-120 (CWE-120). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2022-29189 published, and has it been updated?

CVE-2022-29189 was published on May 20, 2022 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹

🐹 Go

Not in CISA KEV

MEDIUM severity

CVE-2022-29189 — dtls

MEDIUMFix: pion/dtls@a6397ff

CVE-2022-29189 is a medium-severity (CVSS 5.3) CWE-120 vulnerability in github.com/pion/dtls. A fix is available for github.com/pion/dtls — see the affected versions and patch details below.

Buffer for inbound DTLS fragments has no limit

Also known asGHSA-cx94-mrg9-rq4jGO-2022-0461

Published

May 20, 2022

Updated

Oct 28, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2022-29189.

EPSS Exploitation Probability

via FIRST.org ↗

2.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs82th percentile — riskier than 82% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

🐹github.com/pion/dtls🐹github.com/pion/dtls/v2

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

A buffer that was used for inbound network traffic had no upper limit. Pion DTLS would buffer all network traffic from the remote user until the handshake completes or times out. An attacker could exploit this to cause excessive memory usage.

Patches

Upgrade to Pion DTLS v2.1.4

Workarounds

No workarounds available, upgrade to Pion DTLS v2.1.4

References

Thank you to Juho Nurminen and the Mattermost team for discovering and reporting this.

For more information

If you have any questions or comments about this advisory:

Open an issue in Pion DTLS
Email us at [email protected]

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/pion/dtls`	all versions	2.1.4`go get github.com/pion/dtls@v2.1.4`
🐹Go	`github.com/pion/dtls/v2`	all versions	2.1.4`go get github.com/pion/dtls/v2@v2.1.4`

Affected Products

1 product · 1 configurations

Application

dtlspion

< 2.1.4

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/pion/dtls, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/pion/dtls to 2.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29189 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact A buffer that was used for inbound network traffic had no upper limit. Pion DTLS would buffer all network traffic from the remote user until the handshake completes or times out. An attacker could exploit this to cause excessive memory usage. ### Patches Upgrade to Pion DTLS v2.1.4 ### Workarounds No workarounds available, upgrade to Pion DTLS v2.1.4 ### References Thank you to [Juho Nurminen](https://github.com/jupenur) and the Mattermost team for discovering and reporting this. ### For more information If you have any questions or comments about this advisory: * Open an issue