CVE-2026-25075 in strongSwan
Summary
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.
Responsible
VulnCheck
Reservation
01/28/2026
Disclosure
03/23/2026
Entries
| ID | Vulnerability | CWE | Base | Temp | 0day | Today | Exp | KEV | EPSS | CTI | Cou | CVE |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 352574 | strongSwan TTLS AVP integer underflow | 191 | 6.4 | 6.3 | $0-$5k | $0-$5k | Not defined | 0.00152 | 1.10 | Official fix | CVE-2026-25075 |