A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to crash.
CVSS Details
- CVSS 3.1 Base Score: 4.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libssh-configUpgrade libsshUpgrade libssh-devel | May 27, 2026 | May 19, 2026 |
| Alpine Linux | — | Upgrade libssh | Dec 5, 2025 | Jul 24, 2025 |
| Amazon_linux_2023 | — | Upgrade libssh-develUpgrade libssh-debugsourceUpgrade libsshUpgrade libssh-configUpgrade libssh-debuginfo | Nov 11, 2025 | Jul 24, 2025 |
| Debian | — | Upgrade libssh | Jul 28, 2025 | Jul 28, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade libssh | Nov 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade libssh | Dec 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade libssh | Nov 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade libssh | Dec 12, 2025 | Nov 6, 2025 |
| Redhat_linux | — | No solution existsUpgrade libsshUpgrade libssh-configUpgrade libssh-debuginfoUpgrade libssh-debugsourceUpgrade libssh-devel | Jul 31, 2025 | Jul 24, 2025 |
| Rocky_linux | — | Upgrade libssh-debugsourceUpgrade libssh-debuginfoUpgrade libssh-develUpgrade libssh | Jun 1, 2026 | May 28, 2026 |
| Suse | — | Upgrade libssh4Upgrade libssh-configUpgrade libssh-develUpgrade libssh4-32bit | Dec 5, 2025 | Sep 26, 2025 |
| Ubuntu | — | Upgrade libssh-gcrypt-4Upgrade libssh-gcrypt-4 (Ubuntu Pro)Upgrade libssh-4 (Ubuntu Pro)Upgrade libssh-4 | Nov 5, 2025 | Jul 24, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 29, 2026 | Jul 24, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub