CVE-2020-11017 Double free in cliprdr_server_receive_capabilities in FreeRDP

What is CVE-2020-11017?

CVE-2020-11017 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 29 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Weakness: CWE-415

Which versions are affected by CVE-2020-11017?

It affects 3 products.

Products include Debian Debian Linux, Freerdp Freerdp, Opensuse Leap.

How do I fix CVE-2020-11017?

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-2020-11017 being exploited?

There is no known exploitation of CVE-2020-11017 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-2020-11017, GHSA-q5c8-fm29-q57c, UBUNTU-CVE-2020-11017.