Is CVE-2015-8631 in the CISA KEV catalog?

No. CVE-2015-8631 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8631?

CVE-2015-8631 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2015-8631?

CVE-2015-8631 has an EPSS score of 4.64% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8631?

Upgrade krb5 on debian 11 to 1.13.2+dfsg-5 or later.

CVE & CISA-KEV Catalog

CVE-2015-8631

MEDIUMEPSS 91th pctl

6.5

CVSS v3

NVD

Description

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.

CWE-772

How to fix

Remediation Available

krb5Debian

Fixed in:1.13.2+dfsg-5CVE-2015-8631

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

4.64%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

krbdev.mit.edu

Third-Party Advisory7

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.