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OpenAdvisories
High USN-7441-1 2 CVEs

mosquitto vulnerabilities

Published Apr 16, 2025 · Updated Jun 25, 2026

Summary

It was discovered that Eclipse Mosquitto client incorrectly handled
memory when receiving a SUBACK packet. An attacker with a malicious
broker could possibly use this issue to execute arbitrary code or
cause a denial of service. (CVE-2024-10525)

Xiangpu Song discovered that Eclipse Mosquitto broker did not properly
manage memory under certain circumstances. A malicious client with a
remote connection could possibly use this issue to cause the broker to
crash resulting in a denial of service, or another unspecified impact.
This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS.
(CVE-2024-3935)

Fixed packages 6

ReleasePackageFixed in
Ubuntu · 22.04 LTS 22.04:LTS mosquitto 2.0.11-1ubuntu1.2
Ubuntu · Pro 14.04 LTS Pro:14.04:LTS mosquitto 0.15-2+deb7u3ubuntu0.1+esm1
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS mosquitto 1.4.8-1ubuntu0.16.04.7+esm2
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS mosquitto 1.4.15-2ubuntu0.18.04.3+esm2
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS mosquitto 1.6.9-1ubuntu0.1~esm2
Ubuntu · Pro 24.04 LTS Pro:24.04:LTS mosquitto 2.0.18-1ubuntu0.1~esm1

Vulnerabilities 2

  • High 7.2
    CVE-2024-10525 EPSS 59%

    Eclipse Mosquito: Heap Buffer Overflow in my_subscribe_callback

    In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no reason codes, a client using libmosquitto may make out of bounds memory access when acting in its on_subscribe callback. This affects the mosq…

  • Medium 6.0

    Eclipse Mosquito: Double free vulnerability

    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 …

References

  • report
    https://ubuntu.com/security/CVE-2024-3935
  • report
    https://ubuntu.com/security/CVE-2024-10525