CVE-2020-6072 Use after free in Videolabs

What is CVE-2020-6072?

CVE-2020-6072 is a critical use after free vulnerability in Debian Debian Linux, published on 24 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An exploitable code execution vulnerability exists in the label-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing compressed labels in mDNS messages, the rr_decode function's return value is not checked, leading to a double free that could be exploited to execute arbitrary code. An attacker can send an mDNS message to trigger this vulnerability.

Weakness: CWE-415

Which versions are affected by CVE-2020-6072?

It affects 2 products.

Products include Debian Debian Linux, Videolabs Libmicrodns.

How do I fix CVE-2020-6072?

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-2020-6072 being exploited?

There is no known exploitation of CVE-2020-6072 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 DEBIAN-CVE-2020-6072, GHSA-jqrj-pmvg-62w8, UBUNTU-CVE-2020-6072.