vulnerability
Red Hat: CVE-2025-5372: libssh: Incorrect Return Code Handling in ssh_kdf() in libssh (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:M/Au:S/C:P/I:P/A:P) | Jul 4, 2025 | Jul 9, 2025 | Nov 26, 2025 |
Severity
6
CVSS
(AV:N/AC:M/Au:S/C:P/I:P/A:P)
Published
Jul 4, 2025
Added
Jul 9, 2025
Modified
Nov 26, 2025
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.
Solutions
no-fix-redhat-rpm-packageredhat-upgrade-libsshredhat-upgrade-libssh-configredhat-upgrade-libssh-debuginforedhat-upgrade-libssh-debugsourceredhat-upgrade-libssh-devel
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.