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A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade dhcp | Aug 22, 2024 | Jan 16, 2019 |
| Amazon Linux Ami 2 | — | Upgrade dhcp-develUpgrade dhcp-libsUpgrade dhcp-debuginfoUpgrade dhcpUpgrade dhcp-commonUpgrade dhclient | Apr 27, 2020 | Jan 16, 2019 |
| Amazon_linux | — | Upgrade dhcp | Mar 2, 2020 | Mar 1, 2018 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jan 16, 2019 |
| Centos_linux | — | Upgrade dhcp-develUpgrade dhcp-commonUpgrade dhcp-libsUpgrade dhcpUpgrade dhcp-debuginfoUpgrade dhclient | Jun 19, 2018 | Mar 1, 2018 |
| Debian | — | Upgrade isc-dhcp | Feb 19, 2019 | Jan 16, 2019 |
| Freebsd | — | Upgrade isc-dhcp44-clientUpgrade isc-dhcp43-serverUpgrade isc-dhcp43-clientUpgrade isc-dhcp44-server | Dec 10, 2025 | Mar 2, 2018 |
| Gentoo Linux | — | Upgrade net-misc/dhcp. | Apr 9, 2018 | Apr 8, 2018 |
| Huawei Euleros 2_0_sp1 | — | Upgrade dhclientUpgrade dhcp-commonUpgrade dhcp-libsUpgrade dhcp | May 2, 2018 | Feb 28, 2018 |
| Huawei Euleros 2_0_sp2 | — | Upgrade dhcp-libsUpgrade dhcpUpgrade dhcp-commonUpgrade dhclient | May 2, 2018 | Feb 28, 2018 |
| Oracle Solaris | — | Upgrade service/network/dhcp/isc-dhcp to version 4.3.6.1.0-0.175.3.31.0.4.0 on Solaris 11.3 | Apr 18, 2018 | Apr 18, 2018 |
| Oracle_linux | — | Upgrade dhclientUpgrade dhcpUpgrade dhcp-develUpgrade dhcp-commonUpgrade dhcp-libs | Mar 2, 2020 | Feb 28, 2018 |
| Redhat_linux | — | No solution existsUpgrade dhclientUpgrade dhcp-develUpgrade dhcp-libsUpgrade dhcpUpgrade dhcp-debuginfoUpgrade dhcp-common | May 1, 2018 | Mar 1, 2018 |
| Suse | — | Upgrade dhcpUpgrade dhcp-clientUpgrade dhcp-relayUpgrade dhcp-serverUpgrade dhcp-devel | Jun 21, 2018 | Mar 1, 2018 |
| Ubuntu | — | Upgrade isc-dhcp-server-ldapUpgrade isc-dhcp-clientUpgrade isc-dhcp-serverUpgrade isc-dhcp-relay | Apr 26, 2018 | Mar 1, 2018 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jan 16, 2019 |
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