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THREAT OPSThreat News › [NVD] CVE-2025-5987 (HIGH 8.1) — 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 returne

[NVD] CVE-2025-5987 (HIGH 8.1) — 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 returne

lownvdPublished 2025-07-07

CVE-2025-5987 CVSS: 8.1 HIGH Published: 2025-07-07T15:15:28.180

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

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-5987