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CVE-2025-8114

Libssh: null pointer dereference in libssh kex session id calculation

Published: 7/24/2025 Last updated: 6/30/2026 Reserved: 7/24/2025

A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to crash.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 4.7 Medium CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Opam packages affected (1)

libssh

Products affected (16)

Product Vendor Version
10 Version 1809 for 32-bit Systems
Red Hat Enterprise Linux 9 Red Hat 10 Version 1809 for x64-based Systems
Red Hat Enterprise Linux 9 Red Hat 10 Version 1809 for ARM64-based Systems
Red Hat Enterprise Linux 10 Red Hat 10 Version 1709 for 32-bit Systems
Red Hat Enterprise Linux 8 Red Hat 10 for 32-bit Systems
Android-10 Android-11 Android-8.1 Android-9
Red Hat Enterprise Linux 9 Red Hat < *
Red Hat Enterprise Linux 9 Red Hat < *
Red Hat Enterprise Linux 10 Red Hat < *
Red Hat Enterprise Linux 8 Red Hat < *
Red Hat Enterprise Linux 6 Red Hat 10 Version 1709 for x64-based Systems
Red Hat Enterprise Linux 7 Red Hat 10 Version 1709 for ARM64-based Systems
Red Hat Enterprise Linux 7 Red Hat < *
Red Hat Enterprise Linux 6 Red Hat < *
Red Hat OpenShift Container Platform 4 Red Hat 10 for x64-based Systems
Red Hat OpenShift Container Platform 4 Red Hat < *

References (12)

Credits (2)