Open5GS AMF nsmf-handler.c amf_nsmf_pdusession_handle_update_sm_context denial of service
Published Mar 4, 2025
6.9
MEDIUMCVSS 4.0
EPSS 0.83%
Description
A vulnerability classified as problematic was found in Open5GS up to 2.7.2. Affected by this vulnerability is the function amf_nsmf_pdusession_handle_update_sm_context of the file src/amf/nsmf-handler.c of the component AMF. The manipulation leads to denial of service. The attack can be launched remotely. This vulnerability allows a single UE to crash the AMF, resulting in the complete loss of mobility and session management services and causing a network-wide outage. All registered UEs will lose connectivity, and new registrations will be blocked until the AMF is restarted, leading to a high availability impact. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue.
Affected products
- Vendor n/a Product Open5GS Defaultn/a
- Version 2.7.0StatusaffectedConstraints-
- Version 2.7.1StatusaffectedConstraints-
- Version 2.7.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n/a | Open5GS | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Mar 4, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (6 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.83% (0.00831) | 56.03th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.74% (0.00744) | 49.74th | v5 (v2026.06.15) |
| Apr 14, 2026 | 0.36% (0.00358) | 58.05th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.36% (0.01361) | 78.51th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.07% (0.00067) | 17.94th | v4 (v2025.03.14) |
| Mar 5, 2025 | 0.05% (0.00052) | 23.68th | v3 (v2023.03.01) |
References (5)
- https://github.com/guoweifk/BugReport/blob/main/Open5GS%20AMF%20Denial%20of%20Service%20via%20PDU%20Session%20ID%20Conflict exploitThird Party Advisory
- https://github.com/open5gs/open5gs/pull/3711 issue-trackingIssue TrackingVendor Advisory
- https://vuldb.com/?ctiid.298513 signaturepermissions-requiredPermissions RequiredVDB Entry
- https://vuldb.com/?id.298513 vdb-entrytechnical-descriptionexploitThird Party AdvisoryVDB Entry
- https://vuldb.com/?submit.506038 third-party-advisoryThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://github.com/guoweifk/BugReport/blob/main/Open5GS%20AMF%20Denial%20of%20Service%20via%20PDU%20Session%20ID%20Conflict | exploitThird Party Advisory | |
| https://github.com/open5gs/open5gs/pull/3711 | issue-trackingIssue TrackingVendor Advisory | |
| https://vuldb.com/?ctiid.298513 | signaturepermissions-requiredPermissions RequiredVDB Entry | |
| https://vuldb.com/?id.298513 | vdb-entrytechnical-descriptionexploitThird Party AdvisoryVDB Entry | |
| https://vuldb.com/?submit.506038 | third-party-advisoryThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.