Medium severity · published Aug 27, 2026
CVE-2026-71402
wicked: out-of-bounds read in the DHCPv4 option parser due to payload length taken from the IP total length
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WI
wicked · SUSE
through 0.6.80 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71402
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-71402
bugzilla.suse.com
https://bugzilla.suse.com/show_bug.cgi?id=1274627
github.com
https://github.com/openSUSE/wicked/pull/1079
More from wicked
8.8
CVE-2026-44932
indirect remote shell command injection via unsanitized DHCP options in wicked
5.3
CVE-2026-71401
wicked: integer underflow of the UDP length in ni_capture_inspect_udp_header() leads to an out-of-bounds read
