Upstream information

CVE-2026-94453 at MITRE

Description

Libreswan's pluto daemon has a use-after-free vulnerability when a client connecting using IKE over TCP closes the connection and another packet (retransmit or malicious) is received for the same tuple. IKE state is retained in memory after the client closes the connection, storing a pointer to iface_endpoint inside ike_sa.sa->st_iface_endpoint. Once this invalid pointer is used, the daemon crashes and restarts. This vulnerability can be triggered before the remote peer has authenticated itself. Continued exploitation can lead to a denial of service. Remote code execution could be possible. The IKE over TCP option is not enabled by default; only configurations that contain listen-tcp=yes are affected.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (d42dc95b-23f1-4e06-9076-20753a0fb0df)
Base Score 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
No SUSE Bugzilla entries cross referenced.

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Liberty Linux 10
  • libreswan >= 5.3.3-1.el10_2
  • libreswan-minimal >= 5.3.3-1.el10_2
 Patchnames:
RHSA-2026:89923 (x86_64)
SUSE Liberty Linux 8
  • libreswan >= 4.12-2.el8_10.7
 Patchnames:
RHSA-2026:90492 (x86_64)
SUSE Liberty Linux 9
  • libreswan >= 4.15-11.el9_8
 Patchnames:
RHSA-2026:89748 (x86_64)

SUSE Timeline for this CVE

CVE page created: Mon Oct 26 17:52:50 2026
CVE page last modified: Tue Oct 27 17:46:58 2026