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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libssh-develUpgrade libsshUpgrade libssh-config | May 27, 2026 | May 19, 2026 |
| Alpine Linux | — | Upgrade libssh | Dec 5, 2025 | Jul 24, 2025 |
| Amazon_linux_2023 | — | Upgrade libssh-develUpgrade libssh-debuginfoUpgrade libsshUpgrade libssh-debugsourceUpgrade libssh-config | 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 |
| Oracle_linux | — | Upgrade libssh-configUpgrade libsshUpgrade libssh-devel | Oct 22, 2026 | Jul 24, 2025 |
| Redhat_linux | — | Upgrade libssh-configUpgrade libssh-debuginfoUpgrade libssh-debugsourceUpgrade libssh-develNo solution existsUpgrade libssh | Jul 31, 2025 | Jul 24, 2025 |
| Rocky_linux | — | Upgrade libssh-debugsourceUpgrade libssh-develUpgrade libsshUpgrade libssh-debuginfo | Jun 1, 2026 | May 28, 2026 |
| Suse | — | Upgrade libssh4Upgrade libssh4-32bitUpgrade libssh-develUpgrade libssh-config | Dec 5, 2025 | Sep 26, 2025 |
| Ubuntu | — | Upgrade libssh-gcrypt-4Upgrade libssh-4 (Ubuntu Pro)Upgrade libssh-gcrypt-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 |
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