CVE-2017-9078 Use after free in n/a

What is CVE-2017-9078?

CVE-2017-9078 is a high-severity use after free vulnerability in Debian Debian Linux, published on 19 May 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The server in Dropbear before 2017.75 might allow post-authentication root remote code execution because of a double free in cleanup of TCP listeners when the -a option is enabled.

Weakness: CWE-415

Which versions are affected by CVE-2017-9078?

It affects 3 products.

Products include Debian Debian Linux, Dropbear Ssh Project Dropbear Ssh, Netapp H410c Firmware.

How do I fix CVE-2017-9078?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2017-9078 being exploited?

There is no known exploitation of CVE-2017-9078 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• 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-2017-9078, DEBIAN-CVE-2017-9078, GHSA-p8gj-w7rh-3g6f, UBUNTU-CVE-2017-9078.