CVE-2026-77206

Published: Ott 14, 2026 Last Modified: Ott 14, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: d42dc95b-23f1-4e06-9076-20753a0fb0df
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

Libreswan's IKEv2 state machine has a null pointer dereference bug in the EAP handling code for authentication. As a result of inconsistency within the IKEv2 state machine code, this bug can be triggered by any IKEv2 connection, even if EAP is not configured at all. The error is caused by a fall-through where it incorrectly dereferences ike->sa.st_eap which is NULL. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. The bug results in a crash and restart of the pluto daemon. No remote code execution is possible. Continued exploitation can cause a denial of service.

476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C++, Java, C#, Go
Likelihood of Exploit: Medium
View CWE Details
https://libreswan.org/security/CVE-2026-77206/
https://libreswan.org/security/CVE-2026-77206/
https://libreswan.org/security/CVE-2026-77206/CVE-2026-7720…
https://libreswan.org/security/CVE-2026-77206/CVE-2026-77206.txt