SUSE wicked up to 0.6.80 DHCPv4 Client src/capture.c ni_capture_inspect_udp_header out-of-bounds

Summaryinfo

A vulnerability, which was classified as critical, has been found in SUSE wicked up to 0.6.80. This issue affects the function ni_capture_inspect_udp_header of the file src/capture.c of the component DHCPv4 Client. The manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2026-71402. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in SUSE wicked up to 0.6.80 and classified as critical. This issue affects the function ni_capture_inspect_udp_header of the file src/capture.c of the component DHCPv4 Client. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at bugzilla.suse.com. The identification of this vulnerability is CVE-2026-71402 since 08/06/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• SUSE

Name

• wicked

Version

• 0.6.0
• 0.6.1
• 0.6.2
• 0.6.3
• 0.6.4
• 0.6.5
• 0.6.6
• 0.6.7
• 0.6.8
• 0.6.9
• 0.6.10
• 0.6.11
• 0.6.12
• 0.6.13
• 0.6.14
• 0.6.15
• 0.6.16
• 0.6.17
• 0.6.18
• 0.6.19
• 0.6.20
• 0.6.21
• 0.6.22
• 0.6.23
• 0.6.24
• 0.6.25
• 0.6.26
• 0.6.27
• 0.6.28
• 0.6.29
• 0.6.30
• 0.6.31
• 0.6.32
• 0.6.33
• 0.6.34
• 0.6.35
• 0.6.36
• 0.6.37
• 0.6.38
• 0.6.39
• 0.6.40
• 0.6.41
• 0.6.42
• 0.6.43
• 0.6.44
• 0.6.45
• 0.6.46
• 0.6.47
• 0.6.48
• 0.6.49
• 0.6.50
• 0.6.51
• 0.6.52
• 0.6.53
• 0.6.54
• 0.6.55
• 0.6.56
• 0.6.57
• 0.6.58
• 0.6.59
• 0.6.60
• 0.6.61
• 0.6.62
• 0.6.63
• 0.6.64
• 0.6.65
• 0.6.66
• 0.6.67
• 0.6.68
• 0.6.69
• 0.6.70
• 0.6.71
• 0.6.72
• 0.6.73
• 0.6.74
• 0.6.75
• 0.6.76
• 0.6.77
• 0.6.78
• 0.6.79
• 0.6.80

License

• open-source

Website

• Vendor: https://www.suse.com/

CPE 2.3info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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