Request-handler panic via missing error-path return
Published Jan 23, 2026 · Updated Jan 23, 2026
Null pointer dereference in free5GC PCF 1.4.0 allows remote authenticated users to trigger a panic through a policy deletion request. HandleDeletePoliciesPolAssoId writes a not-found response when PCFUeFindByPolicyId returns nil but continues into delete(ue.AMPolicyData, polAssoId), dereferencing the nil UE. The demonstrated path requires network access and a valid PCF bearer token; the upstream report shows a handler panic but does not establish process termination.
Summary
What happened
Null pointer dereference in free5GC PCF 1.4.0 allows remote authenticated users to trigger a panic through a policy deletion request. HandleDeletePoliciesPolAssoId writes a not-found response when PCFUeFindByPolicyId returns nil but continues into delete(ue.AMPolicyData, polAssoId), dereferencing the nil UE. The demonstrated path requires network access and a valid PCF bearer token; the upstream report shows a handler panic but does not establish process termination.
The record
- CVE
- CVE-2025-66720
- Published
- Jan 23, 2026
- Updated
- Jan 23, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 23, 2026CVE publishedPublication date reported by the CVE source.
- Jan 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- PCF policy deletion panic reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo