CVE-2026-25075
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| strongSwan | strongSwan | 4.5.0 < 6.0.5 | affected |
Weaknesses
- CWE-191: CWE-191: Integer Underflow (Wrap or Wraparound)
- CWE-476: NULL Pointer Dereference (CWE-476)
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
CVE Program Container
Additional References
References
- 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
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