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Fedora 43 Libreswan Important IKE Tunnel Security Update CVE-2026-14957

fedora
Calendar Grey July 25, 2026
Scroller Fedora
Libreswan update in Fedora 43 addresses CVE-2026-14957 for enhanced security of IPsec connections.
Fedora 43 has released an update for Libreswan version 5.3.2 to address CVE-2026-14957, offering tools for secure IPsec tunnel setup and management.

Summary

Libreswan is a free implementation of IPsec & IKE for Linux. IPsec is

the Internet Protocol Security and uses strong cryptography to provide

both authentication and encryption services. These services allow you

to build secure tunnels through untrusted networks. Everything passing

through the untrusted net is encrypted by the ipsec gateway machine and

decrypted by the gateway at the other end of the tunnel. The resulting

tunnel is a virtual private network or VPN.

This package contains the daemons and userland tools for setting up

Libreswan.

Libreswan also supports IKEv2 (RFC7296) and Secure Labeling

Libreswan is based on Openswan-2.6.38 which in turn is based on FreeS/WAN-2.04

Update Information:

Update to 5.3.2 for CVE-2026-14957 (with newsources)

Topics%20covered

Topics Covered

security advisory update important linux ipsec libreswan

Change Log

* Fri Jul 17 2026 Paul Wouters - 5.3.2-2 - Update to 5.3.2 for CVE-2026-14957 (with newsources) * Fri Jul 17 2026 Paul Wouters - 5.3.2-1 - Update to 5.3.2 for CVE-2026-14957 * Thu Jul 16 2026 Fedora Release Engineering - 5.3.1-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild * Wed Jun 24 2026 Paul Wouters - 5.3.1-1 - Update to libreswan-5.3.1 * Thu Jan 29 2026 Daiki Ueno - 5.3-5 - Fix compilation error on Fedora 44 * Fri Jan 16 2026 Fedora Release Engineering - 5.3-4 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild

References

Fedora Update Notification FEDORA-2026-146b86f436 2026-07-26 01:15:59.915573+00:00 Name : libreswan Product : Fedora 43 Version : 5.3.2 Release : 2.fc43 URL : https://libreswan.org/ Summary : Internet Key Exchange (IKEv1 and IKEv2) implementation for IPsec Description : Libreswan is a free implementation of IPsec & IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks. Everything passing through the untrusted net is encrypted by the ipsec gateway machine and decrypted by the gateway at the other end of the tunnel. The resulting tunnel is a virtual private network or VPN. This package contains the daemons and userland tools for setting up Libreswan. Libreswan also supports IKEv2 (RFC7296) and Secure Labeling Libreswan is based on Openswan-2.6.38 which in turn is based on FreeS/WAN-2.04

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-146b86f436' 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
important
Lowest
Low
Medium
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Critical

Name: libreswan
Product: Fedora 43
Version: 5.3.2
Release: 2.fc43
URL: https://libreswan.org/
Summary: Internet Key Exchange (IKEv1 and IKEv2) implementation for IPsec

Topics%20covered

Topics Covered

security advisory update important linux ipsec libreswan

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