CVE-2017-7652 Denial of service in Eclipse Mosquitto

What is CVE-2017-7652?

CVE-2017-7652 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 Apr 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Eclipse Mosquitto 1.4.14, if a Mosquitto instance is set running with a configuration file, then sending a HUP signal to server triggers the configuration to be reloaded from disk. If there are lots of clients connected so that there are no more file descriptors/sockets available (default limit typically 1024 file descriptors on Linux), then opening the configuration file will fail.

Weakness: CWE-789

Which versions are affected by CVE-2017-7652?

It affects 2 products.

Products include Debian Debian Linux, Eclipse Mosquitto.

How do I fix CVE-2017-7652?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-7652 being exploited?

There is no known exploitation of CVE-2017-7652 in the wild and no public exploit code.

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-7652, DEBIAN-CVE-2017-7652, GHSA-7349-r6vq-ggx3, UBUNTU-CVE-2017-7652.