Out-of-bounds Read Affecting wicked-service package, versions <0.6.79-150400.3.44.1


Severity

Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-SLES154-WICKEDSERVICE-19528370
  • published4 Sept 2026
  • disclosed27 Aug 2026

Introduced: 27 Aug 2026

NewCVE-2026-71402  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-130  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 wicked-service 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-service package and not the wicked-service package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

An out-of-bounds read was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c reports the IP total length as the payload length instead of the length of the remaining UDP payload. Consequently, the DHCP option walker in the DHCPv4 client (wickedd-dhcp4) reads up to ihl + 8 bytes — at most 68 bytes — past the end of the 1500-byte packet receive buffer. An unauthenticated attacker on the same network who sends a crafted DHCP/UDP packet can make the client parse adjacent heap memory as DHCP options, so that heap contents such as allocator metadata or pointer values can be interpreted into lease fields. The over-read is bounded to 68 bytes; no memory write, no attacker control over the adjacent bytes and no remote exfiltration primitive has been demonstrated. This issue affects wicked up to and including version 0.6.80.

CVSS Base Scores

version 3.1