In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade dhcp-clientUpgrade dhcp-serverUpgrade dhcp-relayUpgrade dhcp-libsUpgrade dhcp-common | May 15, 2023 | Oct 7, 2022 |
| Alpine Linux | — | Upgrade dhcp | Mar 26, 2024 | Oct 7, 2022 |
| Amazon Linux Ami 2 | — | Upgrade dhclientUpgrade dhcpUpgrade dhcp-develUpgrade dhcp-debuginfoUpgrade dhcp-commonUpgrade dhcp-libs | Nov 10, 2022 | Oct 7, 2022 |
| Centos_linux | — | Upgrade dhcp-debugsourceUpgrade dhcp-libs-debuginfoUpgrade dhcp-relayUpgrade dhcp-serverUpgrade dhcp-client-debuginfoUpgrade dhcp-debuginfoUpgrade dhcp-clientUpgrade dhcp-libsUpgrade dhcp-server-debuginfoUpgrade dhcp-commonUpgrade dhcp-relay-debuginfo | May 15, 2023 | Oct 7, 2022 |
| Debian | — | Upgrade isc-dhcp | Oct 12, 2022 | Oct 7, 2022 |
| Gentoo Linux | — | Upgrade net-misc/dhcp. | May 4, 2023 | Oct 7, 2022 |
| Huawei Euleros 2_0_sp10 | — | Upgrade dhcp | Dec 22, 2022 | Oct 7, 2022 |
| Huawei Euleros 2_0_sp11 | — | Upgrade dhcp | Jan 6, 2023 | Oct 7, 2022 |
| Huawei Euleros 2_0_sp5 | — | Upgrade dhcp-libsUpgrade dhcp-commonUpgrade dhclientUpgrade dhcp | Mar 9, 2023 | Oct 7, 2022 |
| Huawei Euleros 2_0_sp8 | — | Upgrade dhcp-clientUpgrade dhcp-serverUpgrade dhcp-libsUpgrade dhcp-commonUpgrade dhcp-relay | Dec 9, 2022 | Oct 7, 2022 |
| Huawei Euleros 2_0_sp9 | — | Upgrade dhcp | Jan 9, 2023 | Oct 7, 2022 |
| Oracle_linux | — | Upgrade dhcp-clientUpgrade dhcp-commonUpgrade dhcp-libsUpgrade dhcp-relayUpgrade dhcp-server | May 17, 2023 | Oct 5, 2022 |
| Redhat_linux | — | Upgrade dhcp-server-debuginfoUpgrade dhcp-libsUpgrade dhcp-debuginfoUpgrade dhcp-debugsourceUpgrade dhcp-relayNo solution existsUpgrade dhcp-relay-debuginfoUpgrade dhcp-libs-debuginfoUpgrade dhcp-clientUpgrade dhcp-serverUpgrade dhcp-client-debuginfoUpgrade dhcp-common | May 15, 2023 | Oct 7, 2022 |
| Suse | — | Upgrade dhcp-clientUpgrade dhcp-develUpgrade dhcp-docUpgrade dhcpUpgrade dhcp-relayUpgrade dhcp-server | Nov 16, 2022 | Oct 7, 2022 |
| Ubuntu | — | Upgrade isc-dhcp-server (Ubuntu Pro)Upgrade isc-dhcp-clientUpgrade isc-dhcp-client (Ubuntu Pro)Upgrade isc-dhcp-server | Oct 6, 2022 | Oct 5, 2022 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Oct 7, 2022 |
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