The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade libssh | Jul 30, 2024 | Apr 13, 2016 |
| Freebsd | — | Upgrade libssh | Dec 10, 2025 | May 10, 2015 |
| Redhat_linux | — | No solution exists | Jul 16, 2026 | Apr 30, 2015 |
| Suse | — | Upgrade libssh4Upgrade libssh-develUpgrade libssh-devel-docUpgrade libssh4-32bit | Feb 23, 2016 | Oct 9, 2015 |
| Ubuntu | — | Upgrade libssh-4 | Feb 23, 2016 | Feb 23, 2016 |
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