What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-27 · updated 2026-09-01
• Weakness: CWE-191

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.

Affected products

• SUSE wicked: through 0.6.80

References

• https://bugzilla.suse.com/show_bug.cgi?id=1274627
• https://github.com/openSUSE/wicked/pull/1079

Get alerted when CVE-2026-71401 or the next vulnerability affects your stack