CVE-2023-34966

HIGHNVD 7.58.3▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.3 because EPSS predicts 60% probability of exploitation within the next 30 days (top 1.0% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 60%
CISA-KEV: Not listedEPSS: 60%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.

CVSS v3
7.5
EG Score
8.3(high)
EG Risk
66(Track)
EG Risk 66/100SSVC: 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
Severity83% × 45%
Exploitation60% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.0%
KEV
Not listed

Published

July 20, 2023

Last Modified

November 21, 2024

References (20)

Vendor Advisories for CVE-2023-34966(1)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuctdb (2:4.17.7+dfsg-1ubuntu1.1) @ lunar2026-05-24ubuntu
ubuntuwinbind (2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2) @ xenial2026-05-24ubuntu
redhatsamba-0:4.17.5-105.el9_22024-06-25redhat
redhatsamba-0:4.17.5-5.el8_82024-01-30redhat
redhatsamba-0:4.15.5-15.el8_62024-01-25redhat
redhatsamba-0:4.18.6-1.el82023-11-14redhat
redhatsamba-0:4.18.6-100.el92023-11-07redhat

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.

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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. 2026-07-23 02:23 UTCEG score recompute▲ 0.80
  2. 2026-07-22 23:10 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
  4. 2026-07-20 17:06 UTCEPSS rescore
  5. 2026-07-19 02:27 UTCEPSS rescore
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  7. 2026-07-16 17:01 UTCEPSS rescore
  8. 2026-07-15 16:56 UTCEPSS rescore
  9. 2026-07-15 16:56 UTCEPSS rescore
  10. 2026-07-15 14:19 UTCOSV refresh
  11. 2026-07-15 01:58 UTCEPSS rescore
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  13. 2026-07-13 22:28 UTCEPSS rescore
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  15. 2026-07-13 06:11 UTCEPSS rescore
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  17. 2026-07-11 08:26 UTCEPSS rescore
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  19. 2026-07-08 15:13 UTCEPSS rescore
  20. 2026-07-05 02:29 UTCEPSS rescore
  21. 2026-07-02 16:59 UTCEPSS rescore
  22. 2026-07-01 15:04 UTCEPSS rescore
  23. 2026-06-28 04:55 UTCEPSS rescore
  24. 2026-06-28 04:55 UTCEPSS rescore
  25. 2026-06-27 15:04 UTCOSV refresh
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  1. 2026-06-27 03:07 UTCEPSS rescore
  2. 2026-06-27 03:07 UTCEPSS rescore
  3. 2026-06-25 13:48 UTCEPSS rescore
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  5. 2026-06-24 14:04 UTCEPSS rescore
  6. 2026-06-24 14:03 UTCEPSS rescore
  7. 2026-06-23 21:31 UTCEPSS rescore
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  9. 2026-06-22 14:24 UTCEPSS rescore
  10. 2026-06-22 14:24 UTCEPSS rescore
  11. 2026-06-21 01:58 UTCEPSS rescore
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  13. 2026-06-18 17:51 UTCEPSS rescore
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  15. 2026-06-17 17:51 UTCEPSS rescore
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  17. 2026-06-16 17:51 UTCEPSS rescore
  18. 2026-06-16 17:51 UTCEPSS rescore
  19. 2026-06-15 17:47 UTCEPSS rescore
  20. 2026-06-14 23:16 UTCEPSS rescore
  21. 2026-06-13 22:59 UTCEPSS rescore
  22. 2026-06-13 22:59 UTCEPSS rescore
  23. 2026-06-12 23:10 UTCEPSS rescore
  24. 2026-06-12 23:10 UTCEPSS rescore
  25. 2026-06-11 13:59 UTCEPSS rescore
  26. 2026-06-11 13:59 UTCEPSS rescore
  27. 2026-06-10 22:17 UTCEPSS rescore
  28. 2026-06-10 13:21 UTCEPSS rescore
  29. 2026-06-10 01:47 UTCOSV refresh
  30. 2026-06-07 15:23 UTCEPSS rescore
  31. 2026-06-07 15:23 UTCEPSS rescore
  32. 2026-06-06 13:46 UTCEPSS rescore
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  34. 2026-06-05 22:46 UTCEPSS rescore
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  36. 2026-06-05 06:09 UTCEPSS rescore
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  38. 2026-06-04 13:11 UTCEPSS rescore
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  40. 2026-06-02 20:12 UTCEPSS rescore
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  42. 2026-06-02 20:12 UTCEPSS rescore
  43. 2026-06-01 13:51 UTCEPSS rescore
  44. 2026-06-01 13:51 UTCEPSS rescore
  45. 2026-05-31 22:30 UTCEPSS rescore
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  47. 2026-05-31 22:29 UTCEPSS rescore
  48. 2026-05-31 00:15 UTCEPSS rescore
  49. 2026-05-31 00:15 UTCEPSS rescore
  50. 2026-05-29 13:43 UTCEPSS rescore
  51. 2026-05-29 13:43 UTCEPSS rescore
  52. 2026-05-28 13:43 UTCEPSS rescore
  53. 2026-05-28 13:43 UTCEPSS rescore
  54. 2026-05-27 13:39 UTCEPSS rescore
  55. 2026-05-26 13:43 UTCEPSS rescore
  56. 2026-05-26 13:43 UTCEPSS rescore
  57. 2026-05-26 07:18 UTCEPSS rescore
  58. 2026-05-26 07:18 UTCEPSS rescore
  59. 2026-05-26 07:18 UTCEPSS rescore
  60. 2026-05-24 20:53 UTCEG score recompute
  61. 2026-05-24 20:53 UTCVendor advisory
  62. 2026-05-24 20:53 UTCGHSA enrichment
  63. 2026-05-24 16:52 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-34966?
CVE-2023-34966 is a high vulnerability published on July 20, 2023. An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function slunpackloop() did not validate a field in the network packet that contains the count of elements in an array-like…
When was CVE-2023-34966 disclosed?
CVE-2023-34966 was first published in the National Vulnerability Database on July 20, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-34966 actively exploited?
CVE-2023-34966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-34966?
CVE-2023-34966 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.3.
How do I remediate CVE-2023-34966?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-34966, 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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