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Fedora 43: direwolf Critical Reachable Assertion and Buffer Overflow DoS

fedora
Calendar Grey January 2, 2026
Dist Fedora Esm H88
Critical update for direwolf on Fedora 43 addresses multiple denial of service issues through reachable assertions and buffer overflows.
https://github.com/wb2osz/direwolf/releases/tag/1.8.1

Summary

Dire Wolf is a modern software replacement for the old 1980's style

TNC built with special hardware. Without any additional software, it

can perform as an APRS GPS Tracker, Digipeater, Internet Gateway

(IGate), APRStt gateway. It can also be used as a virtual TNC for

other applications such as APRSIS32, UI-View32, Xastir, APRS-TW, YAAC,

UISS, Linux AX25, SARTrack, Winlink Express, BPQ32, Outpost PM, and many

others.

Update Information:

https://github.com/wb2osz/direwolf/releases/tag/1.8.1

Topics%20covered

Topics Covered

security advisory denial of service fedora critical bug report direwolf

Change Log

* Wed Dec 24 2025 Richard Shaw - 1.8.1-1 - Update to 1.8.1. - Build with libgpiod.

References


[ 1 ] Bug #2401397 - direwolf-1.8.1 is available https://bugzilla.redhat.com/show_bug.cgi?id=2401397 [ 2 ] Bug #2424537 - CVE-2025-34458 direwolf: wb2osz/direwolf <= 1.8 Reachable Assertion DoS [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2424537 [ 3 ] Bug #2424538 - CVE-2025-34458 direwolf: wb2osz/direwolf <= 1.8 Reachable Assertion DoS [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2424538 [ 4 ] Bug #2424539 - CVE-2025-34457 direwolf: wb2osz/direwolf <= 1.8 Stack-based Buffer Overflow DoS [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2424539 [ 5 ] Bug #2424540 - CVE-2025-34457 direwolf: wb2osz/direwolf <= 1.8 Stack-based Buffer Overflow DoS [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2424540

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-793e1e1341' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
critical
Lowest
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Critical

Name: direwolf
Product: Fedora 43
Version: 1.8.1
Release: 1.fc43
URL: https://github.com/wb2osz/direwolf/
Summary: Sound Card-based AX.25 TNC

Topics%20covered

Topics Covered

security advisory denial of service fedora critical bug report direwolf

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