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CVE-2025-5987 Detail

Description

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2025-5987 Red Hat, Inc. Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=2376219 Red Hat, Inc. Issue Tracking  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-393 Return of Wrong Status Code Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-5987
NVD Published Date:
07/07/2025
NVD Last Modified:
08/22/2025
Source:
Red Hat, Inc.