CVE-2026-71402

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-08-27. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
github_pr

capture: fix two OOB reads in ni_capture_inspect_udp_header

Fix merged in openSUSE/wicked PR #1079 on 2026-08-27 — awaiting tagged release

https://github.com/openSUSE/wicked/pull/1079
generic

Making sure you're not a bot!

https://bugzilla.suse.com/show_bug.cgi?id=1274627

Vendor Advisories for CVE-2026-71402(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 62× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 04:51 UTCEG score recompute
  2. 2026-09-19 04:51 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 04:29 UTCEG score recompute
  5. 2026-09-18 04:29 UTCGHSA enrichment
  6. 2026-09-17 04:07 UTCEG score recompute
  7. 2026-09-17 04:07 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-16 03:42 UTCGHSA enrichment
  11. 2026-09-15 03:19 UTCEG score recompute
  12. 2026-09-15 03:19 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 02:57 UTCEG score recompute
  15. 2026-09-14 02:57 UTCGHSA enrichment
  16. 2026-09-13 02:35 UTCEG score recompute
  17. 2026-09-13 02:35 UTCGHSA enrichment
  18. 2026-09-12 15:02 UTCEPSS rescore
  19. 2026-09-12 02:13 UTCEG score recompute
  20. 2026-09-12 02:12 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 01:50 UTCEG score recompute
  23. 2026-09-11 01:50 UTCGHSA enrichment
  24. 2026-09-10 09:35 UTCEPSS rescore
  25. 2026-09-10 01:28 UTCGHSA enrichment
Show 37 more
  1. 2026-09-09 01:05 UTCEG score recompute
  2. 2026-09-09 01:05 UTCGHSA enrichment
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 00:43 UTCEG score recompute
  5. 2026-09-08 00:42 UTCGHSA enrichment
  6. 2026-09-07 00:20 UTCEG score recompute
  7. 2026-09-07 00:20 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-05 23:54 UTCEG score recompute
  10. 2026-09-05 23:54 UTCGHSA enrichment
  11. 2026-09-04 23:32 UTCEG score recompute
  12. 2026-09-04 23:32 UTCGHSA enrichment
  13. 2026-09-04 05:07 UTCEPSS rescore
  14. 2026-09-03 22:12 UTCGHSA enrichment
  15. 2026-09-02 21:25 UTCEG score recompute
  16. 2026-09-02 21:25 UTCGHSA enrichment
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-01 21:03 UTCEG score recompute
  19. 2026-09-01 21:03 UTCGHSA enrichment
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-09-01 04:40 UTCEPSS rescore
  22. 2026-09-01 00:59 UTCGHSA enrichment
  23. 2026-08-31 00:37 UTCEG score recompute
  24. 2026-08-31 00:37 UTCGHSA enrichment
  25. 2026-08-30 19:17 UTCEPSS rescore
  26. 2026-08-30 01:22 UTCEPSS rescore
  27. 2026-08-30 00:15 UTCGHSA enrichment
  28. 2026-08-28 23:53 UTCEG score recompute
  29. 2026-08-28 23:53 UTCGHSA enrichment
  30. 2026-08-28 21:42 UTCEPSS rescore
  31. 2026-08-27 20:27 UTCEG score recompute
  32. 2026-08-27 20:27 UTCGHSA enrichment
  33. 2026-08-27 20:17 UTCEG score recompute
  34. 2026-08-27 20:17 UTCGHSA enrichment
  35. 2026-08-27 17:24 UTCEG score recompute
  36. 2026-08-27 16:47 UTCEG score recompute
  37. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-71402?
CVE-2026-71402 is a medium vulnerability published on August 27, 2026. An out-of-bounds read was found in the DHCPv4 packet capture code of wicked. nicaptureinspectudpheader() 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)…
When was CVE-2026-71402 disclosed?
CVE-2026-71402 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71402 actively exploited?
CVE-2026-71402 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.4% of all scored CVEs.
What is the CVSS score of CVE-2026-71402?
CVE-2026-71402 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-71402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71402, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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