CVE-2024-29862: The Kerlink firewall in ChirpStack chirpstack-mqtt-forwarder before 4.2.1 and chirpstack-gateway-bridge before

Q: How do I fix CVE-2024-29862?

gateway bridge: upgrade to 4.0.11; mqtt forwarder: upgrade to 4.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2024-29862 being exploited?

CVE-2024-29862 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-29862 affect?

CVE-2024-29862 affects gateway bridge, mqtt forwarder. Severity is high (CVSS 7.5). The Kerlink firewall in ChirpStack chirpstack-mqtt-forwarder before 4.2.1 and chirpstack-gateway-bridge before 4.0.11 wrongly accepts certain TCP packets when a connection is not in the ESTABLISHED state.

Q: How urgent is CVE-2024-29862?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2024-29862 is a high-severity flaw (CVSS 7.5) affecting gateway bridge, mqtt forwarder. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Kerlink firewall in ChirpStack chirpstack-mqtt-forwarder before 4.2.1 and chirpstack-gateway-bridge before 4.0.11 wrongly accepts certain TCP packets when a connection is not in the ESTABLISHED state.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Published	2024-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chirpstack

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-03-21 04:15 UTCPublished CVE record published
2026-06-17 07:23 UTCUpdated Record last modified

chirpstack gateway bridge UPGRADE

Affected: < 4.0.11

Fixed in: 4.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gateway-bridge || rpm -q gateway-bridge || gateway-bridge --version

2. UPGRADE to 4.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gateway-bridge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gateway-bridge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

chirpstack mqtt forwarder UPGRADE

Affected: < 4.2.1

Fixed in: 4.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mqtt-forwarder || rpm -q mqtt-forwarder || mqtt-forwarder --version

2. UPGRADE to 4.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mqtt-forwarder

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mqtt-forwarder

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-29862?

gateway bridge: upgrade to 4.0.11; mqtt forwarder: upgrade to 4.2.1. Exact commands for each OS are on this page.

Is CVE-2024-29862 being exploited?

CVE-2024-29862 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-29862 affect?

CVE-2024-29862 affects gateway bridge, mqtt forwarder. Severity is high (CVSS 7.5). The Kerlink firewall in ChirpStack chirpstack-mqtt-forwarder before 4.2.1 and chirpstack-gateway-bridge before 4.0.11 wrongly accepts certain TCP packets when a connection is not in the ESTABLISHED state.

How urgent is CVE-2024-29862?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

References

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