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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
strongSwan strongSwan
Default version status: unaffected
4.5.0 to < 6.0.5affected
pkg:github/strongswan/strongswanReferences
- https://www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).html ↗
- https://www.strongswan.org/blog/2026/03/23/strongswan-6.0.5-released.html ↗
- https://y637f9qq2x.com/posts/cve-2026-25075/ ↗
- https://www.vulncheck.com/advisories/strongswan-eap-ttls-avp-parsing-integer-underflow ↗
- https://lists.debian.org/debian-lts-announce/2026/03/msg00016.html ↗