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CVE-2023-39975

Published: Aug 16, 2023Updated: Feb 25, 2026 Sources: CVE List NVDCWE-415
NVD MITRE
8.8CVSSHIGH
EPSS Score
1.2%
Top 35.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

kdc/do_tgs_req.c in MIT Kerberos 5 (aka krb5) 1.21 before 1.21.2 has a double free that is reachable if an authenticated user can trigger an authorization-data handling failure. Incorrect data is copied from one ticket to another.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-415

Affected Products

n/an/a
kerberos 5mit
On-prem
Operating Systems
mitoss-projectUSOperating Systemsaka mit krb5, mit kerberos

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://web.mit.edu/kerberos/www/advisories/
web.mit.edu
https://github.com/krb5/krb5/compare/krb5-1.21.1-final...krb5-1.21.2-final
github.com
https://github.com/krb5/krb5/commit/88a1701b423c13991a8064feeb26952d3641d840
github.com
and 3 more references View all →

Timeline

Published
Aug 16, 2023
Last Updated
Feb 25, 2026

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