CVE-2025-65561: free5gc Input Validation Flaw — Exploit

Description

An issue was discovered in function LocalNode.Sess in free5GC 4.1.0 allowing attackers to cause a denial of service or other unspecified impacts via crafted header Local SEID to the PFCP Session Modification Request.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
free5gc	free5gc	All

References

Exploits

https://github.com/free5gc/free5gc/issues/730 https://github.com/free5gc/free5gc/issues/730

Other References

https://github.com/free5gc/go-upf/pull/80

Frequently Asked Questions

What is CVE-2025-65561? +

An issue was discovered in function LocalNode.Sess in free5GC 4.1.0 allowing attackers to cause a denial of service or other unspecified impacts via crafted header Local SEID to the PFCP Session Modification Request. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-65561? +

CVE-2025-65561 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-65561? +

CVE-2025-65561 affects products from free5gc, specifically: free5gc. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65561? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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