What’s Vulnerable › Vulnerabilities

CVE-2025-9405: Open5GS gmm-sm.c gmm_state_exception assertion

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-25 · updated 2026-06-17
• Weakness: CWE-617

Description

A security flaw has been discovered in Open5GS up to 2.7.5. The impacted element is the function gmm_state_exception of the file src/amf/gmm-sm.c. The manipulation results in reachable assertion. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The patch is identified as 8e5fed16114f2f5e40bee1b161914b592b2b7b8f. Applying a patch is advised to resolve this issue.

Affected products

• Open5GS: before 2.7.6 — fixed in 2.7.6

How to fix

Upgrade to a fixed version: Open5GS 2.7.6. Check the vendor advisory for mitigations.

References

• https://github.com/ZHENGHAOHELLO/BugReport/blob/main/CVE-2025-9405
• https://github.com/open5gs/open5gs/commit/8e5fed16114f2f5e40bee1b161914b592b2b7b8f
• https://github.com/open5gs/open5gs/issues/3947
• https://github.com/open5gs/open5gs/issues/3947#issuecomment-3029992728
• https://github.com/user-attachments/files/21013084/amf_udm-uecm.zip
• https://vuldb.com/?ctiid.321241
• https://vuldb.com/?id.321241
• https://vuldb.com/?submit.633467
• https://github.com/open5gs/open5gs/issues/3947
• https://github.com/open5gs/open5gs/issues/3947#issuecomment-3029992728
• https://vuldb.com/?submit.633467

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