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.
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: 4.6%CVSS: 6.5Exploit: None knownExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v3
- 6.5
- EG Score
- 6.5MEDIUMmedium confidence
- EG Risk
- 36EG Risk 36/100CISA 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 computedSeverity65% × 45%Exploitation5% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 4.6%
- EPSS %ILE
- 91st
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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
February 13, 2016
Last Modified
June 17, 2026
References (18)
- cve@mitrehttp://krbdev.mit.edu/rt/Ticket/Display.html?id=8343
- cve@mitrehttp://lists.opensuse.org/opensuse-updates/2016-02/msg00059.html
- cve@mitrehttp://lists.opensuse.org/opensuse-updates/2016-02/msg00110.html
- cve@mitrehttp://rhn.redhat.com/errata/RHSA-2016-0493.html
- cve@mitrehttp://rhn.redhat.com/errata/RHSA-2016-0532.html
- cve@mitrehttp://www.debian.org/security/2016/dsa-3466
- cve@mitrehttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- cve@mitrehttp://www.securitytracker.com/id/1034916
- cve@mitrehttps://github.com/krb5/krb5/commit/83ed75feba32e46f736fcce0d96a0445f29b96c2
- af854a3a-2127-422b-91ae-364da2661108http://krbdev.mit.edu/rt/Ticket/Display.html?id=8343
- af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-02/msg00059.html
- af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-02/msg00110.html
- af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-0493.html
- af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-0532.html
- af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3466
Vendor Advisories for CVE-2015-8631
Vendor advisories for this CVE are temporarily unavailable — the list could not be loaded just now. That is not a sign that none exist; please retry shortly.
Patch Availability(2)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | https://access.redhat.com/errata/RHSA-2016:0532 @ 2016-03-31 00:00:00+00 (fixes krb5-0:1.13.2-12.el7_2) | — | 2026-05-22 21:25:02.478515+00 |
| redhat | https://access.redhat.com/errata/RHSA-2016:0493 @ 2016-03-22 00:00:00+00 (fixes krb5-0:1.10.3-42z1.el6_7) | — | 2026-05-22 21:25:02.466603+00 |
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.
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.4:krb5 · Debian:8:krb5 · Debian:6.0:krb5
- CVE-2015-8629EG 5.3MEDIUM
- CVE-2015-2695EG 5.0EPSS p93MEDIUM
- CVE-2015-2697EG 4.0EPSS p91MEDIUM
- CVE-2016-3120EG 6.5EPSS p91MEDIUM
- CVE-2016-3119NVD 5.3EG 6.0EPSS p99MEDIUM
- CVE-2015-2696EG 7.1EPSS p91HIGH
- CVE-2014-9421EG 9.0EPSS p93HIGH
- CVE-2014-5352EG 9.0EPSS p93HIGH
- CVE-2014-4345EG 8.5EPSS p95HIGH
- CVE-2014-4344EG 7.8EPSS p94HIGH
Same vendor
2 shownredhat:RHSA-2016:0493 · redhat:RHSA-2016:0532
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 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 4.6% probability of exploitation in the next 30 days (91st percentile of EPSS-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?
A fix for CVE-2015-8631 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2015-8631
Is Your Infrastructure Affected by CVE-2015-8631?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.