CVE-2025-5372 | BDVDB-2026-284694 Detail

Description#

A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.

Impact#

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Exploit#

History#

1. Version 12025-07-04Record published in the CVE List.
2. Version 22026-11-05Most recent update recorded in the CVE List.