CVE-2026-71401 (GCVE-0-2026-71401)
Vulnerability from cvelistv5 – Published: 2026-08-27 15:01 – Updated: 2026-08-27 19:31
VLAI
EPSS
VEX
Title
wicked: integer underflow of the UDP length in ni_capture_inspect_udp_header() leads to an out-of-bounds read
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 19:30 UTC
CWE
- CWE-191 - Integer underflow (wrap or wraparound)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=1274627 | issue-tracking |
| https://github.com/openSUSE/wicked/pull/1079 | patch |
Impacted products
Date Public
2026-08-27 14:56
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