How severe is CVE-2025-65559?

CVE-2025-65559 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-2025-65559 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65559?

CVE-2025-65559 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65559?

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-2025-65559 have an EU (EUVD) identifier?

Yes. CVE-2025-65559 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204365.

When was CVE-2025-65559 published?

CVE-2025-65559 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2025-65559

CVE-2025-65559 is a high-severity vulnerability in Open5gs 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-617.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204365
Weakness: CWE-617
Affected product: Open5gs
Published: 2025-12-18
Last modified: 2026-06-17

Description

An issue was discovered in Open5GS 2.7.5-49-g465e90f, when processing a PFCP Session Establishment Request (type=50), the UPF crashes with a reachable assertion in `lib/pfcp/context.c` (`ogs_pfcp_object_teid_hash_set`) if the CreatePDR?PDI?F-TEID has CH=1 and the F-TEID address-family flag(s) (IPv4/IPv6) do not match the GTP-U resource family configured for the selected DNN (Network Instance), resulting in a denial of service.

Frequently asked questions

What is CVE-2025-65559?: An issue was discovered in Open5GS 2.7.5-49-g465e90f, when processing a PFCP Session Establishment Request (type=50), the UPF crashes with a reachable assertion in `lib/pfcp/context.c` (`ogs_pfcp_object_teid_hash_set`) if the CreatePDR?PDI?F-TEID has CH=1 and the F-TEID address-family flag(s) (IPv4/IPv6) do not match the GTP-U resource family configured for the selected DNN (Network Instance), resulting in a denial of service.
How severe is CVE-2025-65559?: CVE-2025-65559 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-2025-65559 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65559?: CVE-2025-65559 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65559?: 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-2025-65559 have an EU (EUVD) identifier?: Yes. CVE-2025-65559 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204365.
When was CVE-2025-65559 published?: CVE-2025-65559 was published on 2025-12-18 and last updated on 2026-06-17.

References

https://github.com/open5gs/open5gs/issues/4135

Affected products (1)

cpe:2.3:a:open5gs:open5gs:2.7.5:*:*:*:*:*:*:*

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