Integer Underflow (Wrap or Wraparound) Affecting strongswan package, versions [4.2.12,6.0.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-STRONGSWAN-15032941
- published18 Jan 2026
- disclosed16 Jan 2026
- creditUnknown
Introduced: 16 Jan 2026
CVE-2025-62291 (opens in a new tab)How to fix?
Upgrade strongswan to version 6.0.3 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the process_peer_failure function when processing crafted messages of specific sizes. An attacker can execute arbitrary code or cause a denial of service by sending specially crafted EAP-MSCHAPv2 messages to the client.