VYPR
High severity8.1OSV Advisory· Published Jul 7, 2025· Updated Jun 30, 2026

CVE-2025-5987

CVE-2025-5987

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.

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Affected products

19

Patches

Vulnerability mechanics

References

17

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