🛡️ CVE-2025-5987
🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-393 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-393
Public Exploit ✅ No
Source NVD
Published 2025-07-07
Updated 2026-06-02
Modified 2026-03-20
Fix URL N/A

Affected Packages

Software From version Fixed in
libssh 0.10.0 0.11.2

References

Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2376219

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