Missing Release of Memory after Effective Lifetime Affecting libssh package, versions [0.6.0,0.11.3)
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 applicationsSnyk Learn
Learn about Missing Release of Memory after Effective Lifetime vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-LIBSSH-13003666
- published23 Sept 2025
- disclosed9 Sept 2025
- creditFrancesco Rollo
Introduced: 9 Sep 2025
NewCVE-2025-8277 (opens in a new tab)How to fix?
Upgrade libssh to version 0.11.3 or higher.
Overview
Affected versions of this package are vulnerable to Missing Release of Memory after Effective Lifetime via the key exchange process. An attacker can cause gradual memory exhaustion and potential application crashes by repeatedly initiating key exchanges with incorrect guesses as an authenticated client. This is only exploitable if the attacker has valid client authentication and can perform repeated incorrect key exchange attempts.