CVE-2020-10745 Denial of service in Samba

What is CVE-2020-10745?

CVE-2020-10745 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 7 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.

Weakness: CWE-400

Which versions are affected by CVE-2020-10745?

It affects 4 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Samba Samba.

How do I fix CVE-2020-10745?

Upgrade to a fixed version.

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-2020-10745 being exploited?

There is no known exploitation of CVE-2020-10745 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• 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-2020-10745, DEBIAN-CVE-2020-10745, ECHO-5991-a879-d75b, GHSA-77pj-5756-vfx3, SUSE-SU-2020:14437-1, SUSE-SU-2020:2036-1 and 4 more.