CVE-2020-26575 Denial of service in n/a

What is CVE-2020-26575?

CVE-2020-26575 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 6 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Wireshark through 3.2.7, the Facebook Zero Protocol (aka FBZERO) dissector could enter an infinite loop. This was addressed in epan/dissectors/packet-fbzero.c by correcting the implementation of offset advancement.

Weakness: CWE-835

Which versions are affected by CVE-2020-26575?

It affects 4 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Oracle Zfs Storage Appliance Firmware, Wireshark Wireshark.

How do I fix CVE-2020-26575?

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-2020-26575 being exploited?

There is no known exploitation of CVE-2020-26575 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-2020-26575, GHSA-vw2j-3xrw-2q58, OESA-2021-1076, UBUNTU-CVE-2020-26575.