Vulnerability Description
An integer underflow was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c does not verify that the IP total length field (ip_len) is at least as large as the IP header length (ihl) before subtracting the header length. An unauthenticated attacker on the same network can thereby trigger an out-of-bounds read past the receive buffer in the wicked DHCPv4 client (wickedd-dhcp4), which can crash the daemon depending on the process memory layout. No information disclosure has been demonstrated. This issue affects wicked up to and including version 0.6.80.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-71401?
CVE-2026-71401 is a documented vulnerability. An integer underflow was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c does not verify that the IP total length field (ip_len) is at least as larg...
How severe is CVE-2026-71401?
CVSS scoring is not yet available for CVE-2026-71401. Check NVD for updates.
Is there a patch for CVE-2026-71401?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.