CVE-2023-39975

HIGH
8.8
CVSS Score
Published: August 16, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 06:13 AM UTC
1 product affected across 1 vendorKerberos 5

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Severity
HIGH8.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.21 ≤ v < 1.21.2
Affected range stops below 1.21.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-415

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