CVE-2026-3238

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-08. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the WINS service using specially crafted UDP packets.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity75% × 45%
Exploitation3% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
84%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
Patch available. Sources: redhat.
generic

Samba - Security Announcement Archive

https://www.samba.org/samba/security/CVE-2026-3238.html
redhat Patch Available

2486176 – (CVE-2026-3238) CVE-2026-3238 samba: Denial of service against AD DC WINS server

https://bugzilla.redhat.com/show_bug.cgi?id=2486176
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-3238

Vendor Advisories for CVE-2026-3238(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwinbind (2:4.23.6+dfsg-1ubuntu2.1) @ resolute2026-07-29ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 22× in last 7d / 81× 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.

Showing the most recent 100 of 191 total refreshes for this CVE.

  1. 2026-07-31 18:07 UTCGHSA enrichment
  2. 2026-07-31 04:57 UTCEG score recompute
  3. 2026-07-31 04:57 UTCVendor advisory
  4. 2026-07-31 04:57 UTCGHSA enrichment
  5. 2026-07-30 16:28 UTCEPSS rescore
  6. 2026-07-30 01:30 UTCEPSS rescore
  7. 2026-07-29 06:38 UTCEG score recompute
  8. 2026-07-29 06:38 UTCVendor advisory
  9. 2026-07-29 06:38 UTCGHSA enrichment
  10. 2026-07-28 02:56 UTCEG score recompute
  11. 2026-07-28 02:56 UTCGHSA enrichment
  12. 2026-07-27 14:13 UTCEPSS rescore
  13. 2026-07-27 09:42 UTCGHSA enrichment
  14. 2026-07-26 21:49 UTCEG score recompute
  15. 2026-07-26 21:49 UTCVendor advisory
  16. 2026-07-26 21:49 UTCGHSA enrichment
  17. 2026-07-26 14:54 UTCEPSS rescore
  18. 2026-07-26 14:54 UTCEPSS rescore
  19. 2026-07-26 07:16 UTCEG score recompute
  20. 2026-07-26 07:16 UTCGHSA enrichment
  21. 2026-07-25 14:18 UTCEPSS rescore
  22. 2026-07-25 14:18 UTCEPSS rescore
  23. 2026-07-24 14:17 UTCEPSS rescore
  24. 2026-07-24 14:17 UTCEPSS rescore
  25. 2026-07-23 14:18 UTCEPSS rescore
Show 75 more
  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:09 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 10:23 UTCVendor advisory
  11. 2026-07-16 10:23 UTCGHSA enrichment
  12. 2026-07-15 22:30 UTCVendor advisory
  13. 2026-07-15 22:30 UTCGHSA enrichment
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 15:04 UTCGHSA enrichment
  18. 2026-07-14 02:52 UTCGHSA enrichment
  19. 2026-07-13 22:30 UTCEPSS rescore
  20. 2026-07-13 06:13 UTCEPSS rescore
  21. 2026-07-13 06:13 UTCEPSS rescore
  22. 2026-07-12 11:35 UTCVendor advisory
  23. 2026-07-12 11:35 UTCGHSA enrichment
  24. 2026-07-12 05:46 UTCEPSS rescore
  25. 2026-07-11 21:28 UTCVendor advisory
  26. 2026-07-11 21:28 UTCGHSA enrichment
  27. 2026-07-11 09:34 UTCVendor advisory
  28. 2026-07-11 09:34 UTCGHSA enrichment
  29. 2026-07-11 08:27 UTCEPSS rescore
  30. 2026-07-10 21:41 UTCVendor advisory
  31. 2026-07-10 21:41 UTCGHSA enrichment
  32. 2026-07-09 19:10 UTCEPSS rescore
  33. 2026-07-09 05:05 UTCGHSA enrichment
  34. 2026-07-08 15:59 UTCVendor advisory
  35. 2026-07-08 15:59 UTCGHSA enrichment
  36. 2026-07-08 15:15 UTCEPSS rescore
  37. 2026-07-08 03:42 UTCVendor advisory
  38. 2026-07-08 03:42 UTCGHSA enrichment
  39. 2026-07-07 13:46 UTCEPSS rescore
  40. 2026-07-06 16:27 UTCEPSS rescore
  41. 2026-07-06 16:27 UTCEPSS rescore
  42. 2026-07-06 02:23 UTCEPSS rescore
  43. 2026-07-06 02:23 UTCEPSS rescore
  44. 2026-07-05 17:57 UTCVendor advisory
  45. 2026-07-05 17:57 UTCGHSA enrichment
  46. 2026-07-05 02:30 UTCEPSS rescore
  47. 2026-07-04 15:33 UTCGHSA enrichment
  48. 2026-07-04 06:31 UTCEPSS rescore
  49. 2026-07-03 21:23 UTCVendor advisory
  50. 2026-07-03 21:23 UTCGHSA enrichment
  51. 2026-07-03 09:30 UTCVendor advisory
  52. 2026-07-03 09:30 UTCGHSA enrichment
  53. 2026-07-02 18:45 UTCVendor advisory
  54. 2026-07-02 18:45 UTCGHSA enrichment
  55. 2026-07-02 06:50 UTCVendor advisory
  56. 2026-07-02 06:50 UTCGHSA enrichment
  57. 2026-07-01 18:55 UTCVendor advisory
  58. 2026-07-01 18:55 UTCGHSA enrichment
  59. 2026-07-01 15:06 UTCEPSS rescore
  60. 2026-07-01 07:01 UTCVendor advisory
  61. 2026-07-01 07:01 UTCGHSA enrichment
  62. 2026-06-30 23:22 UTCEPSS rescore
  63. 2026-06-30 16:39 UTCVendor advisory
  64. 2026-06-30 16:39 UTCGHSA enrichment
  65. 2026-06-30 00:18 UTCVendor advisory
  66. 2026-06-30 00:18 UTCGHSA enrichment
  67. 2026-06-29 14:06 UTCEPSS rescore
  68. 2026-06-29 12:25 UTCVendor advisory
  69. 2026-06-29 12:25 UTCGHSA enrichment
  70. 2026-06-29 00:32 UTCGHSA enrichment
  71. 2026-06-28 12:39 UTCVendor advisory
  72. 2026-06-28 12:39 UTCGHSA enrichment
  73. 2026-06-28 04:56 UTCEPSS rescore
  74. 2026-06-28 00:47 UTCVendor advisory
  75. 2026-06-28 00:47 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-3238?
CVE-2026-3238 is a high vulnerability published on June 8, 2026. A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the…
When was CVE-2026-3238 disclosed?
CVE-2026-3238 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3238 actively exploited?
CVE-2026-3238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 15.8% of all scored CVEs.
What is the CVSS score of CVE-2026-3238?
CVE-2026-3238 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3238, 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.

Dependency Blast Radius

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