Vulnerability Description
In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/ea
- https://github.com/strongswan/strongswan/releases
- https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-
- https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html
FAQ
What is CVE-2025-62291?
CVE-2025-62291 is a vulnerability with a CVSS score of 8.1 (HIGH). In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially res...
How severe is CVE-2025-62291?
CVE-2025-62291 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-62291?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.