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CVE-2017-11462

31
FAUCET Score

CVE-2017-11462 is a critical double free vulnerability in MIT Kerberos 5, affecting Fedora and MIT Kerberos 5 products. This flaw allows unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability through network-based attacks with low complexity, stemming from automatic security context deletion errors. Despite its critical CVSS score of 9.8, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), nor is it listed in the KEV catalog. Furthermore, the vulnerability has received minimal community attention or media coverage, indicating a lack of active exploitation or public discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.14CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*
1.14CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.14:alpha1:*:*:*:*:*:*
1.14CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.14:beta1:*:*:*:*:*:*
1.14CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.14:beta2:*:*:*:*:*:*
1.14.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.48%
Probability of exploitation in next 30 days
EPSS Percentile
91.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0548 is in the 86th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: krb5

Vendor Advisories (1)

redhatCVE-2017-11462Low

krb5: Automatic sec context deletion could lead to double-free

Aug 28, 2017

References

krbdev.mit.edu / rt/Ticket/Display.html
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party AdvisoryVDB Entry
github.com / krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED