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What is Wireshark?

Wireshark is the world’s most popular network protocol analyzer. It is used for troubleshooting, analysis, development and education.

Wireshark is hosted by the Wireshark Foundation, a nonprofit which promotes protocol analysis education. Wireshark and the foundation depend on your contributions in order to do their work. If you or your organization would like to contribute or become a sponsor, please visit wiresharkfoundation.org.

What’s New

Bug Fixes

The following bugs have been fixed:

  • GRPC: protobuf_json only displays the truncated string value. Issue 20392.

  • Trailing octet after IPv4 packet end is not detected or displayed in raw bytes. Issue 20423.

  • Wireshark does not correctly decode LIN "go to sleep" in TECMP and CMP. Issue 20463.

  • Fuzz job crash: fuzz-2025-04-25-7554.pcap. Issue 20509.

  • WebSocket per-message compression extentions: fail to decompress server messages (from the 2nd) due to parameter handling. Issue 20531.

  • null. Issue 20539.

  • The LL_PERIODIC_SYNC_WR_IND packet is not properly dissected (packet-btle.c) Issue 20554.

New and Updated Features

There are no new or updated features in this release.

New Protocol Support

There are no new protocols in this release.

Updated Protocol Support

ASAM CMP, F1AP, genl, LIN, Logcat Text, net_dm, netfilter, nvme, ProtoBuf, Quake, TECMP, and WebSocket

New and Updated Capture File Support

There is no new or updated capture file support in this release.

Updated File Format Decoding Support

There is no updated file format support in this release.

Prior Versions

This document only describes the changes introduced in Wireshark 4.2.12. You can find release notes for prior versions at the following locations:

Getting Wireshark

Wireshark source code and installation packages are available from https://www.wireshark.org/download.html.

Vendor-supplied Packages

Most Linux and Unix vendors supply their own Wireshark packages. You can usually install or upgrade Wireshark using the package management system specific to that platform. A list of third-party packages can be found on the download page on the Wireshark web site.

File Locations

Wireshark and TShark look in several different locations for preference files, plugins, SNMP MIBS, and RADIUS dictionaries. These locations vary from platform to platform. You can use Help › About Wireshark › Folders or tshark -G folders to find the default locations on your system.

Getting Help

The User’s Guide, manual pages and various other documentation can be found at https://www.wireshark.org/docs/

Community support is available on Wireshark’s Q&A site and on the wireshark-users mailing list. Subscription information and archives for all of Wireshark’s mailing lists can be found on the web site.

Bugs and feature requests can be reported on the issue tracker.

You can learn protocol analysis and meet Wireshark’s developers at SharkFest.

How You Can Help

The Wireshark Foundation helps as many people as possible understand their networks as much as possible. You can find out more and donate at wiresharkfoundation.org.

Frequently Asked Questions

A complete FAQ is available on the Wireshark web site.