CVE-2025-5372
MEDIUMDescription
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 34% of all known CVEs.
References
Related Vulnerabilities
Other CWE-682 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-30780 | High | 7.5 | 56% | - | Fix |
| CVE-2020-14422 | Medium | 5.9 | 13% | - | Fix |
| CVE-2016-7433 | Medium | 5.3 | 9.8% | - | Fix |
| CVE-2023-35641 | High | 8.8 | 7.2% | - | Fix |
| CVE-2018-8319 | Critical | 9.8 | 7.0% | - | - |
| CVE-2020-0022 | High | 8.8 | 6.1% | - | Fix |
Common questions
How do I fix CVE-2025-5372?
Published advisories record a fix for 13 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2025-5372 being actively exploited?
Not that we know of. CVE-2025-5372 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.42% is the estimated probability that it will be exploited in the next 30 days. That is higher than 34% of all scored CVEs.
How severe is CVE-2025-5372?
CVE-2025-5372 has a CVSS v3 base score of 5.0, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2025-5372 affect?
Published advisories record a fix for libssh (Debian), libssh (Rocky), libssh (Red Hat / RHEL), libssh-config (Red Hat / RHEL), and 9 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-15.