High severity7.5NVD Advisory· Published Mar 23, 2026· Updated May 4, 2026
CVE-2026-25075
CVE-2026-25075
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.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- lists.debian.org/debian-lts-announce/2026/03/msg00016.htmlnvd
- www.strongswan.org/blog/2026/03/23/strongswan-6.0.5-released.htmlnvd
- www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).htmlnvd
- www.vulncheck.com/advisories/strongswan-eap-ttls-avp-parsing-integer-underflownvd
- y637f9qq2x.com/posts/cve-2026-25075/nvd
News mentions
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