Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-71401— wicked: integer underflow of the UDP length in ni_capture_inspect_udp_header() leads to an out-of-bounds read

Quick assessment

Affected
SUSE wicked
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openSUSE wicked是openSUSE社区开源的一套网络配置管理工具集。 openSUSE wicked 0.6.80及之前版本存在数字错误漏洞，该漏洞源于DHCPv4数据包捕获代码存在整数下溢，src/capture.c中的ni_capture_inspect_udp_header()在减去IP头长度前未验证IP总长度字段是否至少等于IP头长度，可能导致同一网络的未认证攻击者触发越界读取，进而造成守护进程崩溃。

CVSS 5.3 · Medium EPSS 0.26% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
SUSE wicked ≤ 0.6.80 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-71401

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
wicked: integer underflow of the UDP length in ni_capture_inspect_udp_header() leads to an out-of-bounds read
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
openSUSE wicked 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openSUSE wicked是openSUSE社区开源的一套网络配置管理工具集。 openSUSE wicked 0.6.80及之前版本存在数字错误漏洞，该漏洞源于DHCPv4数据包捕获代码存在整数下溢，src/capture.c中的ni_capture_inspect_udp_header()在减去IP头长度前未验证IP总长度字段是否至少等于IP头长度，可能导致同一网络的未认证攻击者触发越界读取，进而造成守护进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE wicked 0 ~ 0.6.80 -

II. Public POCs for CVE-2026-71401

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-71401

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-71401 (1)

Vendor Advisories for CVE-2026-71401 (1)

IV. Related Vulnerabilities

Same product: wicked
Same vendor: SUSE
Same weakness: CWE-191