CVE-2024-8376: Memory leak

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-11 · updated 2026-06-17
Weakness: CWE-401

Description

In Eclipse Mosquitto up to version 2.0.18a, an attacker can achieve memory leaking, segmentation fault or heap-use-after-free by sending specific sequences of "CONNECT", "DISCONNECT", "SUBSCRIBE", "UNSUBSCRIBE" and "PUBLISH" packets.

Affected products

The Eclipse Foundation Eclipse Mosquitto: before 2.0.19 — fixed in 2.0.19

How to fix

Upgrade to a fixed version: The Eclipse Foundation Eclipse Mosquitto 2.0.19. Check the vendor advisory for mitigations.

References

https://github.com/eclipse-mosquitto/mosquitto/commit/1914b3ee2a18102d0a94cbdbbfeae1afa03edd17
https://github.com/eclipse/mosquitto/releases/tag/v2.0.19
https://gitlab.eclipse.org/security/cve-assignement/-/issues/26
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/216
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/217
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/218
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/227
https://mosquitto.org/

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