A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a denial of service.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade dhcpcd | Sep 21, 2026 | Jul 1, 2026 |
| Redhat_linux | — | Upgrade dhcpcd-debugsourceUpgrade dhcpcdUpgrade dhcpcd-debuginfo | Aug 14, 2026 | Dec 1, 2024 |
| Rocky_linux | — | Upgrade dhcpcd-debugsourceUpgrade dhcpcd-debuginfoUpgrade dhcpcd | Aug 17, 2026 | Aug 13, 2026 |
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