CVE-2026-71401VulnerabilityPublished 27 Aug 2026Updated 17 Sep 2026

SUSE · Security update for wicked

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

CVE-2026-71402

Authoritative record:CVE-2026-71401· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Adjacent
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Adjacent: The vulnerable system is bound to a protocol stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared proximity (e.g., Bluetooth, NFC, or IEEE 802.11) or logical network (e.g., local IP subnet), or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN within an administrative network zone).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
SUSEwicked	Affected <=0.6.80	Fixed in–
GitHubwicked`pkg:github/wicked`Other threats	Affected <=0.6.80	Fixed in–

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AI-suggested

A security update has been released that fixes these vulnerabilities. Users should apply the official patch from the SUSE Product Security Team to remediate these issues. No additional mitigations are indicated or required beyond applying the update.

Description

This security update for wicked addresses multiple out-of-bounds (OOB) read vulnerabilities in the UDP header inspection and DHCP option parsing code. The fixes prevent size underflows and buffer over-reads by improving packet length validation and handling of DHCP options without length fields. These issues were reported by Daniel Birtwhistle and are tracked as CVE-2026-71401 and CVE-2026-71402. The vulnerabilities could lead to memory safety issues during packet processing.

Impact

Successful exploitation of these vulnerabilities could cause out-of-bounds memory reads during network packet processing, potentially leading to application crashes or information disclosure. No known exploits are reported in the wild. The impact is considered high due to the memory safety issues in a network-facing component.

Summary

The wicked network configuration tool had two out-of-bounds read vulnerabilities in its UDP header inspection and DHCP option parsing functions. Specifically, packets with an IP length smaller than the IP header length could cause a size_t underflow affecting UDP length checksum calculations (CVE-2026-71401). Additionally, the payload length was incorrectly set to the IP length, causing an over-read of DHCP options beyond the buffer by ihl + 8 bytes (CVE-2026-71402). The update fixes these by rejecting invalid packets, correcting payload length calculations, avoiding checksumming invalid packets, and properly handling DHCP option length checks for END and PAD options.

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What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Sep 2026, 02:07 UTC

Technical details

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