Null Pointer Dereference in libssh Affects SSH Protocol Functionality
CVE-2025-8114

4.7MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
24 July 2025

What is CVE-2025-8114?

A vulnerability in libssh, a widely-used library for implementing the SSH protocol, can lead to a NULL pointer dereference during the key exchange (KEX) process. This flaw stems from an allocation failure in the cryptographic functions when calculating the session ID. As a result, either the client or server may experience crashes, posing significant stability risks for applications relying on secure SSH connections.

References

https://access.redhat.com/security/cve/CVE-2025-8114
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2383220
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Jakub Jelen and Philippe Antoine for reporting this issue.
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CVE-2025-8114 : Null Pointer Dereference in libssh Affects SSH Protocol Functionality