CVE-2015-8631

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (memory consumption) via a request specifying a NULL principal name.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity65% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

February 13, 2016

Last Modified

June 17, 2026

References (18)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkrb5-0:1.13.2-12.el7_22016-03-31redhat
redhatkrb5-0:1.10.3-42z1.el6_72016-03-22redhat

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

(8 across 8 ecosystems)
Alpine:v3.4(1)
PackageVulnerable rangeFixed inDependents
krb5—1.14-r1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
krb5—1.13.2+dfsg-5—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
krb5—1.13.2+dfsg-5—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
krb5—1.13.2+dfsg-5—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
krb5—1.13.2+dfsg-5—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
krb51.8.3+dfsg-4 ... 1.8.3+dfsg-4squeeze9 (9 versions)1.8.3+dfsg-4squeeze11—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
krb51.10.1+dfsg-5 ... 1.10.1+dfsg-5+deb7u6 (7 versions)1.10.1+dfsg-5+deb7u7—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
krb51.12.1+dfsg-19, 1.12.1+dfsg-19+deb8u11.12.1+dfsg-19+deb8u2—

Weakness Classification(1)

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

All Vendor Advisories

(2)

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 5× in last 7d / 20× 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 144 total refreshes for this CVE.

  1. 2026-09-19 03:06 UTCOSV refresh
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:21 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
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  14. 2026-08-31 06:55 UTCOSV refresh
  15. 2026-08-27 14:20 UTCEPSS rescore
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  1. 2026-08-14 13:54 UTCOSV refresh
  2. 2026-08-12 13:46 UTCEPSS rescore
  3. 2026-08-11 13:36 UTCEPSS rescore
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  5. 2026-08-08 16:32 UTCEPSS rescore
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  8. 2026-08-05 19:12 UTCEPSS rescore
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  10. 2026-08-04 10:31 UTCEPSS rescore
  11. 2026-08-01 04:11 UTCEPSS rescore
  12. 2026-07-30 02:24 UTCOSV refresh
  13. 2026-07-30 01:26 UTCEPSS rescore
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  15. 2026-07-28 15:31 UTCEPSS rescore
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  19. 2026-07-23 14:14 UTCEPSS rescore
  20. 2026-07-23 01:20 UTCEG score recompute
  21. 2026-07-23 00:21 UTCEG score recompute
  22. 2026-07-22 22:00 UTCEG score recompute
  23. 2026-07-22 14:04 UTCEPSS rescore
  24. 2026-07-21 15:21 UTCEPSS rescore
  25. 2026-07-21 15:21 UTCEPSS rescore
  26. 2026-07-20 17:03 UTCEPSS rescore
  27. 2026-07-19 14:27 UTCEPSS rescore
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  36. 2026-07-13 22:26 UTCEPSS rescore
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  38. 2026-07-12 11:37 UTCOSV refresh
  39. 2026-07-12 05:42 UTCEPSS rescore
  40. 2026-07-11 08:23 UTCEPSS rescore
  41. 2026-07-09 19:05 UTCEPSS rescore
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  63. 2026-06-23 17:00 UTCOSV refresh
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  75. 2026-06-16 17:50 UTCEPSS rescore

Frequently asked(5)

What is CVE-2015-8631?
CVE-2015-8631 is a medium vulnerability published on February 13, 2016. Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (memory consumption) via a request specifying a NULL principal name.
When was CVE-2015-8631 disclosed?
CVE-2015-8631 was first published in the National Vulnerability Database on February 13, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8631 actively exploited?
CVE-2015-8631 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.7% of all scored CVEs.
What is the CVSS score of CVE-2015-8631?
CVE-2015-8631 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2015-8631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8631, 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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