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CVE-2026-25075 (GCVE-0-2026-25075)

Vulnerability from cvelistv5 – Published: 2026-03-23 18:33 – Updated: 2026-07-14 15:53
VLAI
Title
strongSwan 4.5.0 < 6.0.5 EAP-TTLS AVP Parsing Integer Underflow
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.
Severity
8.7 (High)
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
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 14:29 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
Impacted products
Vendor Product Version CPE status
strongSwan strongSwan Affected: 4.5.0 , < 6.0.5 (semver)
    cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-03-23 00:00
Credits
Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck
Show details on NVD website
To clipboard 

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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