Integer Underflow Affecting wicked package, versions <0.6.79-150400.3.44.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-SLES154-WICKED-19528364
  • published4 Sept 2026
  • disclosed27 Aug 2026

Introduced: 27 Aug 2026

NewCVE-2026-71401  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 wicked to version 0.6.79-150400.3.44.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wicked package and not the wicked package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1