How severe is CVE-2025-56394?

CVE-2025-56394 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-56394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56394?

CVE-2025-56394 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-56394 have an EU (EUVD) identifier?

Yes. CVE-2025-56394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30911.

When was CVE-2025-56394 published?

CVE-2025-56394 was published on 2025-09-23 and last updated on 2026-06-17.

CVE-2025-56394

CVE-2025-56394 is a high-severity vulnerability in Free5gc with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30911
Weakness: CWE-122
Affected product: Free5gc
Published: 2025-09-23
Last modified: 2026-06-17

Description

Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow.

Frequently asked questions

What is CVE-2025-56394?: Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow.
How severe is CVE-2025-56394?: CVE-2025-56394 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-56394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56394?: CVE-2025-56394 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-56394 have an EU (EUVD) identifier?: Yes. CVE-2025-56394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30911.
When was CVE-2025-56394 published?: CVE-2025-56394 was published on 2025-09-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*

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