Memory Management Flaw in Libssh Affects System Reliability
CVE-2025-5351

6.5MEDIUM

Key Information:

Vendor

Libssh

Status
Libssh
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
4 July 2025

What is CVE-2025-5351?

A vulnerability exists in the key export functionality of libssh, where an error in the internal handling of cryptographic keys can lead to improper memory management. During error conditions, a memory structure is freed without being cleared, risking a double free scenario if subsequent failures arise. This flaw can result in heap corruption, threatening the stability of applications that rely on key export operations, particularly in environments with limited memory resources.

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Affected Version(s)

libssh 0.10.0 < 0.11.2

References

https://access.redhat.com/security/cve/CVE-2025-5351
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2369367
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Ronald Crane for reporting this issue.
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