RHSA-2026:61779: Important: libreswan security update
Important: libreswan security update
Other sources
Libreswan is an implementation of IPsec and 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 such as virtual private network (VPN).Security Fix(es): librenswan: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload (CVE-2026-50721) librenswan: IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v15) authentication payload (CVE-2026-50722) librenswan: IKEv2 Denial of Service via malformed fragmentation (CVE-2026-12413) libreswan: badly formatted X.509 certificate can cause an assertion failure that crashes the daemon process (CVE-2026-14957) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/libreswanto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5 - Upgrade
Upgrade
redhat/libreswan-debuginfoto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5 - Upgrade
Upgrade
redhat/libreswan-debugsourceto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5 - Upgrade
Upgrade
redhat/libreswanto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5.aa - Upgrade
Upgrade
redhat/libreswan-debuginfoto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5.aa - Upgrade
Upgrade
redhat/libreswan-debugsourceto a version that resolves this vulnerability.Fixed in 4.9-5.el9_2.5.aa - Upgrade
Upgrade
librenswanto a version that resolves this vulnerability.Patch CVE-2026-50722 - Upgrade
Upgrade
librenswanto a version that resolves this vulnerability.Patch CVE-2026-12413 - Upgrade
Upgrade
libreswanto a version that resolves this vulnerability.Patch CVE-2026-14957 - Upgrade
Upgrade
librenswanto a version that resolves this vulnerability.Patch CVE-2026-50721
Event History
Frequently Asked Questions
Which Red Hat environments are covered by this advisory?
The advisory covers selected Red Hat Enterprise Linux offerings for x86_64, ARM 64, Power little endian/Power LE, and IBM z Systems. The listed subscriptions include Extended Life Cycle, 4 years of updates for ARM 64, Update Services for SAP Solutions, and AUS.