Description

strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.

INFO

Published Date :

2026-03-23T18:33:10.952Z

Last Modified :

2026-03-25T14:31:31.421Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-25075 vulnerability.

Vendors Products
Strongswan
  • Strongswan
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-25075.

URL Resource
https://www.strongswan.org/blog/2026/03/23/strongswan-6.0.5-released.html cve-icon cve-icon
https://www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).html cve-icon cve-icon
https://www.vulncheck.com/advisories/strongswan-eap-ttls-avp-parsing-integer-underflow cve-icon cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
Attack Vector
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User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact