An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA such as a duplicated Delete/Notify message a NULL pointer dereference on the deleted state causes the pluto daemon to crash and restart.
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19 Feb 2026 09:18Current
6.8Medium risk
Vulners AI Score6.8
CVSS 3.16.5
EPSS0.00813