Is CVE-2025-5372 in the CISA KEV catalog?

No. CVE-2025-5372 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-5372?

CVE-2025-5372 has a CVSS v3 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2025-5372?

CVE-2025-5372 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-5372?

Upgrade libssh on debian 11 to 0.9.8-0+deb11u2 or later. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2025-5372

MEDIUM

5.0

CVSS v3

NVD

Description

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.

CWE-682

How to fix

Remediation Available

libsshDebian

Fixed in:0.9.8-0+deb11u2CVE-2025-5372

Fixed in:0.10.6-0+deb12u2CVE-2025-5372

Fixed in:0.11.2-1CVE-2025-5372

libsshRed Hat / RHEL

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libsshRocky

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-configRocky

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-configRed Hat / RHEL

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-debuginfoRocky

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-debuginfoRed Hat / RHEL

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-debugsourceRocky

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-debugsourceRed Hat / RHEL

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-develRed Hat / RHEL

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libssh-develRocky

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.4-2.el8_4.2RHSA-2026:24349

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-4.el8_6.2RHSA-2026:25911

Fixed in:0:0.9.6-13.el8_8.2RHSA-2026:20610

Fixed in:0:0.9.6-16.el8_10RHSA-2025:21977

Fixed in:0:0.9.6-3.el9_0.2RHSA-2025:23024

libsshUbuntu

Fixed in:0.9.6-2ubuntu0.22.04.4USN-7619-1

Fixed in:0.10.6-2ubuntu0.1USN-7619-1

libssh-4Ubuntu

Fixed in:0.9.6-2ubuntu0.22.04.4USN-7619-1

Fixed in:0.10.6-2ubuntu0.1USN-7619-1

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

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Third-Party Advisory2

Other references5

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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.