In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.
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Score 6.5 from GitHub Security Advisory published 2022-10-07. NVD baseline CVSS 6.5; sources differ by 0.0.
In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.
October 7, 2022
November 21, 2024
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | isc-dhcp-server-ldap (4.3.3-5ubuntu12.10+esm2) @ xenial | 2026-05-25 | ubuntu |
| ubuntu | isc-dhcp-server-ldap (4.4.1-2.3ubuntu2.3) @ jammy | 2026-05-25 | ubuntu |
| ubuntu | isc-dhcp-server-ldap (4.2.4-7ubuntu12.13+esm2) @ trusty | 2026-05-25 | ubuntu |
| redhat | dhcp-12:4.3.6-49.el8 | 2023-05-16 | redhat |
| redhat | dhcp-12:4.4.2-18.b1.el9 | 2023-05-09 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
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msrc · redhat