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
85%
KEV
Not listed

Published

June 8, 2026

Last Modified

September 1, 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) @ resolute2026-09-14ubuntu

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.

Affected Packages

(6 across 6 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
samba—4.22.10-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
samba—4.23.8-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
samba2:4.13.13+dfsg-1~deb11u1 ... 2:4.13.5+dfsg-2 (8 versions)2:4.13.13+dfsg-1~deb11u8—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
samba2:4.17.10+dfsg-0+deb12u1 ... 2:4.17.9+dfsg-0+deb12u3~bpo11+1 (13 versions)2:4.17.12+dfsg-0+deb12u4—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
samba2:4.22.3+dfsg-4 ... 2:4.22.8+dfsg-0+deb13u1 (7 versions)2:4.22.8+dfsg-0+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
samba2:4.22.3+dfsg-4 ... 2:4.24.3+dfsg-1~bpo13+1 (30 versions)2:4.24.3+dfsg-1—

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 10× in last 7d / 55× 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 336 total refreshes for this CVE.

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

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 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-2026-3238 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 15.1% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-3238

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