Fedora 42 libcoap 4.3.5b Memory Corruption DoS Security Fix 2026-a8ee24f019
fedora
April 28, 2026
Update to 4.3.5b
Summary
The Constrained Application Protocol (CoAP) is a specialized web transfer
protocol for use with constrained nodes and constrained networks in the Internet
of Things. The protocol is designed for machine-to-machine (M2M) applications
such as smart energy and building automation.
libcoap implements a lightweight application-protocol for devices with
constrained resources such as computing power, RF range, memory, bandwidth,
or network packet sizes. This protocol, CoAP, was standardized in the IETF
working group "CoRE" as RFC 7252.
Update Information:
Update to 4.3.5b
Topics Covered
Change Log
* Fri Apr 17 2026 Peter Robinson
References
[ 1 ] Bug #2459331 - CVE-2026-29013 libcoap: libcoap: Memory corruption and denial of service via crafted CoAP requests
https://bugzilla.redhat.com/show_bug.cgi?id=2459331
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-a8ee24f019' 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
PREVIOUS
NEXT
Severity
important
Lowest
Low
Medium
High
Critical
Name: libcoap
Product: Fedora 42
Version: 4.3.5b
Release: 1.fc42
URL: https://libcoap.net/
Summary: C library implementation of CoAP
Topics Covered
Get the latest News and Insights
Get the latest Linux and open source security news straight to your inbox.
Related News
Powered By
Linux Security - Your source for Top Linux News, Advisories, HOWTOs and Feature Releases
QUICK LINKS
subscribe to newsletters!
Like staying secure? So do we.
Sign up for updates, tips, and alerts!