CVE-2020-25862: Debian Linux

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.

Affected products

• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 31 only; version 32 only; version 33 only
• Opensuse Leap: version 15.1 only; version 15.2 only
• Oracle ZFS Storage Appliance Firmware: version 8.8 only
• Wireshark Wireshark: from 2.6.0, up to and including 2.6.20; from 3.0.0, up to and including 3.0.13; from 3.2.0, up to and including 3.2.6

Published 2020-10-06. Last modified 2026-06-17.