CVE-2017-11462

CRITICAL

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via vectors involving automatic deletion of security contexts on error.

Published: Sep 13, 2017 Modified: Jun 17, 2026

CWE-415

CVSS Metrics

CVSSv3

Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (15)

Vendor	Product	Version
mit	kerberos_5	1.14
mit	kerberos_5	1.14
mit	kerberos_5	1.14
mit	kerberos_5	1.14
mit	kerberos_5	1.14.1
mit	kerberos_5	1.14.2
mit	kerberos_5	1.14.3
mit	kerberos_5	1.14.4
mit	kerberos_5	1.14.5
mit	kerberos_5	1.15
mit	kerberos_5	1.15.1
mit	kerberos_5	1.15.1
mit	kerberos_5	1.15.1
fedoraproject	fedora	25
fedoraproject	fedora	26

GitHub Security Advisory GHSA-rr2f-jhmq-594w

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified...

References (8)

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8598 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1488873 Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://github.com/krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8598 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1488873 Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://github.com/krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/

Risk Scores

CVSS Score 9.8 / 10

EPSS Score 5.48%

Top 8% most likely to be exploited

Threat Score 40.8 / 100

Data Sources

NVD EPSS GitHub