CVE-2024-44775: kmqtt v0.2.7 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception

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HIGH 7.5REMOTEDOWNGRADE

CVE-2024-44775 is a high-severity flaw (CVSS 7.5) affecting kmqtt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

kmqtt v0.2.7 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception. A remote attacker can cause the broker to crash by sending a specially crafted MQTT CONNECT packet that triggers an unhandled null reference, leading to an immediate process termination.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-444
Published	2024-10-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: davidepianca98

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

Am I affected?

Timeline

2024-10-15 21:15 UTCPublished CVE record published
2026-06-17 07:53 UTCUpdated Record last modified

davidepianca98 kmqtt DOWNGRADE

Affected: 0.2.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.7

1. Check installed version

apt-cache policy kmqtt || rpm -q kmqtt || kmqtt --version

2. No fixed release: DOWNGRADE to a release before 0.2.7 (Debian / Ubuntu)

apt-cache madison kmqtt sudo apt install kmqtt=<VERSION_BEFORE_0.2.7> sudo apt-mark hold kmqtt

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kmqtt sudo dnf downgrade kmqtt-<VERSION_BEFORE_0.2.7> sudo dnf versionlock add kmqtt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-44775?

kmqtt: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-44775 being exploited?

CVE-2024-44775 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-2024-44775 affect?

CVE-2024-44775 affects kmqtt. Severity is high (CVSS 7.5). kmqtt v0.2.7 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception. A remote attacker can cause the broker to crash by sending a specially crafted MQTT CONNECT packet that triggers an unhandled null reference, leading to

How urgent is CVE-2024-44775?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-50947 HIGH 7.5 DOWNGRADE An issue in kmqtt v0.2.7 allows attackers to cause a Denial of Service (DoS) via a crafted request.

References

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