CVE catalog
CVE-2025-5372
libssh vulnerabilities
- Severity
- High · CVSS 7.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.50% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libssh | sid | 0.12.2-1 | fixed |
| Debian | libssh | forky | 0.12.2-1 | fixed |
| Debian | libssh | trixie | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | trixie-security | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | bookworm | 0.10.6-0+deb12u2 | fixed |
| Debian | libssh | bookworm-security | 0.10.6-0+deb12u3 | fixed |
| Ubuntu | libssh | noble | 0.10.6-0+deb12u2 | fixed |
| Ubuntu | libssh | noble | 0.10.6-2ubuntu0.1 | fixed |
| Ubuntu | libssh-4 | noble | 0.10.6-2ubuntu0.1 | fixed |
| Ubuntu | libssh-dev | noble | 0.10.6-2ubuntu0.1 | fixed |
| Ubuntu | libssh-doc | noble | 0.10.6-2ubuntu0.1 | fixed |
| Ubuntu | libssh-gcrypt-4 | noble | 0.10.6-2ubuntu0.1 | fixed |
| Ubuntu | libssh-gcrypt-dev | noble | 0.10.6-2ubuntu0.1 | fixed |
| Cpe | libssh | Not reported | 0.11.2 | fixed |
| Cpe | openshift_container_platform | Not reported | Not reported | unknown |
| Cpe | enterprise_linux | Not reported | Not reported | unknown |
| Ubuntu | libssh | pro | 0.9.0-1ubuntu1 | vulnerable |
| Ubuntu | libssh | pro | 0.9.0-1ubuntu4 | vulnerable |
| Ubuntu | libssh | pro | 0.9.0-1ubuntu5 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu1 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.1 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.2 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.3 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.4 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.5 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.5+esm1 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.5+esm2 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.5+esm3 | vulnerable |
| Ubuntu | libssh | pro | 0.9.3-2ubuntu2.5+esm4 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-1build1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2build1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2ubuntu0.22.04.1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2ubuntu0.22.04.2 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2ubuntu0.22.04.3 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2ubuntu0.22.04.4 | fixed |
| Ubuntu | libssh | 24.04 | 0.10.5-3ubuntu1 | vulnerable |
| Ubuntu | libssh | 24.04 | 0.10.5-3ubuntu2 | vulnerable |
| Ubuntu | libssh | 24.04 | 0.10.6-2 | vulnerable |
| Ubuntu | libssh | 24.04 | 0.10.6-2build1 | vulnerable |
| Ubuntu | libssh | 24.04 | 0.10.6-2build2 | vulnerable |
| Ubuntu | libssh | 24.04 | 0.10.6-2ubuntu0.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libssh | source | sid | 0.11.2-1 | not yet assigned | Not reported | [1108407] |
| Debian | libssh | source | forky | 0.11.2-1 | not yet assigned | Not reported | [1108407] |
| Debian | libssh | source | trixie | 0.11.2-1 | not yet assigned | Not reported | [1108407] |
| Debian | libssh | source | bookworm | 0.10.6-0+deb12u2 | not yet assigned | Not reported | [1108407] |
| Ubuntu | libssh | deb | noble | 0.10.6-0+deb12u2 | Not reported | Not reported | Not reported |
| Ubuntu | libssh | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libssh-4 | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libssh-dev | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libssh-doc | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libssh-gcrypt-4 | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libssh-gcrypt-dev | deb | noble | 0.10.6-2ubuntu0.1 | Not reported | Not reported | Not reported |
| Cpe | libssh | cpe | Not reported | 0.11.2 | Not reported | NVD-CVE-2025-5372 | Not reported |
| Ubuntu | libssh | deb | 22.04 | 0.9.6-2ubuntu0.22.04.4 | Not reported | UBUNTU-CVE-2025-5372 | Not reported |
| Ubuntu | libssh | deb | 24.04 | 0.10.6-2ubuntu0.1 | Not reported | UBUNTU-CVE-2025-5372 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libssh-4]Affected
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
- [libssh-dev]Affected
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
- [libssh-doc]Affected
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
- [libssh-gcrypt-4]Affected
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
- [libssh-gcrypt-dev]Affected
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.10.6-0+deb12u2usn · libssh · debian · bookworm; usn · libssh · debian · 12
[Debian 13 (Trixie)]
- [libssh-4]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
- [libssh-dev]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
- [libssh-doc]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.11.2-1usn · libssh · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2025_21977.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-5372]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-5372]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-5372]
- [https://security-tracker.debian.org/tracker/CVE-2025-5372]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-5372.json]
- [https://ubuntu.com/security/notices/USN-7619-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1194.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]