CVE-2026-58216

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-30. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 30, 2026

Last Modified

July 31, 2026

Advisory Details (4)

Auto-updated Jul 30, 2026
Patch available. Sources: redhat.
generic

Samba - Security Announcement Archive

https://www.samba.org/samba/security/CVE-2026-58216.html
generic

16087 – (CVE-2026-58216) [SECURITY] CVE-2026-58216: kpasswd service: 6-byte heap OOB read in packet parser

https://bugzilla.samba.org/show_bug.cgi?id=16087
redhat

2502721 – (CVE-2026-58216) CVE-2026-58216 samba: kpasswd service: kpasswd packet that contains malformed ASN.1 might cause the server to access 6 bytes of unallocated memory leading server to crash

https://bugzilla.redhat.com/show_bug.cgi?id=2502721
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-58216

Vendor Advisories for CVE-2026-58216(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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwinbind (2:4.15.13+dfsg-0ubuntu1.13) @ jammy2026-10-04ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
samba2:4.13.13+dfsg-1 ... 2:4.24.5+dfsg-1~bpo13+1 (245 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
samba2:4.17.10+dfsg-0+deb12u1 ... 2:4.25.0~rc1+dfsg-1 (178 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
samba2:4.22.10+dfsg-0+deb13u1 ... 2:4.22.8+dfsg-0+deb13u2 (9 versions)
  • every version up to 2:4.22.10+dfsg-0+deb13u2: fixed in 2:4.22.10+dfsg-0+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
samba2:4.22.3+dfsg-4 ... 2:4.24.5+dfsg-1~bpo13+1 (34 versions)
  • every version up to 2:4.24.5+dfsg-1: fixed in 2:4.24.5+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 18× in last 7d / 88× 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 224 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58216?
CVE-2026-58216 is a medium vulnerability published on July 30, 2026. An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of…
When was CVE-2026-58216 disclosed?
CVE-2026-58216 was first published on July 30, 2026, with the most recent update on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58216 actively exploited?
CVE-2026-58216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-58216?
CVE-2026-58216 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-58216?
A fix for CVE-2026-58216 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-58216 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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