Is CVE-2024-3935 in the CISA KEV catalog?

No. CVE-2024-3935 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-3935?

CVE-2024-3935 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2024-3935?

CVE-2024-3935 has an EPSS score of 0.76% (51th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-3935?

Upgrade mosquitto on debian 11 to 2.0.11-1+deb11u2 or later. Fixes are available for 8 affected products.

CVE & CISA-KEV Catalog

CVE-2024-3935

MEDIUM

6.5

CVSS v3

NVD

Description

In Eclipse Mosquito, versions from 2.0.0 through 2.0.18, if a Mosquitto broker is configured to create an outgoing bridge connection, and that bridge connection has an incoming topic configured that makes use of topic remapping, then if the remote connection sends a crafted PUBLISH packet to the broker a double free will occur with a subsequent crash of the broker.

CWE-415

How to fix

Remediation Available

mosquittoDebian

Fixed in:2.0.11-1+deb11u2CVE-2024-3935

Fixed in:2.0.11-1.2+deb12u2CVE-2024-3935

Fixed in:2.0.20-1CVE-2024-3935

libmosquitto0Ubuntu

Fixed in:0.15-2+deb7u3ubuntu0.1+esm1USN-7441-1

libmosquitto1Ubuntu

Fixed in:1.4.8-1ubuntu0.16.04.7+esm2USN-7441-1

Fixed in:1.4.15-2ubuntu0.18.04.3+esm2USN-7441-1

Fixed in:1.6.9-1ubuntu0.1~esm2USN-7441-1

Fixed in:2.0.11-1ubuntu1.2USN-7441-1

Fixed in:2.0.18-1ubuntu0.1~esm1USN-7441-1

libmosquittopp0Ubuntu

Fixed in:0.15-2+deb7u3ubuntu0.1+esm1USN-7441-1

libmosquittopp1Ubuntu

Fixed in:1.4.8-1ubuntu0.16.04.7+esm2USN-7441-1

Fixed in:1.4.15-2ubuntu0.18.04.3+esm2USN-7441-1

Fixed in:1.6.9-1ubuntu0.1~esm2USN-7441-1

Fixed in:2.0.11-1ubuntu1.2USN-7441-1

Fixed in:2.0.18-1ubuntu0.1~esm1USN-7441-1

mosquittoUbuntu

Fixed in:0.15-2+deb7u3ubuntu0.1+esm1USN-7441-1

Fixed in:1.4.8-1ubuntu0.16.04.7+esm2USN-7441-1

Fixed in:1.4.15-2ubuntu0.18.04.3+esm2USN-7441-1

Fixed in:1.6.9-1ubuntu0.1~esm2USN-7441-1

Fixed in:2.0.11-1ubuntu1.2USN-7441-1

Fixed in:2.0.18-1ubuntu0.1~esm1USN-7441-1

mosquitto-clientsUbuntu

Fixed in:0.15-2+deb7u3ubuntu0.1+esm1USN-7441-1

Fixed in:1.4.8-1ubuntu0.16.04.7+esm2USN-7441-1

Fixed in:1.4.15-2ubuntu0.18.04.3+esm2USN-7441-1

Fixed in:1.6.9-1ubuntu0.1~esm2USN-7441-1

Fixed in:2.0.11-1ubuntu1.2USN-7441-1

Fixed in:2.0.18-1ubuntu0.1~esm1USN-7441-1

python-mosquittoUbuntu

Fixed in:0.15-2+deb7u3ubuntu0.1+esm1USN-7441-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.76%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

Patch1

github.com

Exploit1

gitlab.eclipse.org

Release Notes1

mosquitto.org

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-25136	Medium	6.5	90%	-	Fix
CVE-2018-0101	Critical	10.0	87%	-	Fix
CVE-2003-0545	Critical	9.8	85%	-	Fix
CVE-2019-3829	Medium	5.3	59%	-	Fix
CVE-2026-33824	Critical	9.8	56%	-	Fix
CVE-2021-3407	Medium	5.5	50%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.