CVE-2025-15539
Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jan 18, 2026
- Updated
- Feb 23, 2026
- Reserved
- Jan 18, 2026
Description
A vulnerability was determined in Open5GS up to 2.7.6. Impacted is the function sgwc_s11_handle_downlink_data_notification_ack of the file src/sgwc/s11-handler.c of the component sgwc. This manipulation causes denial of service. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b4707272c1caf6a7d4dca905694ea55557a0545f. To fix this issue, it is recommended to deploy a patch. The issue report is flagged as already-fixed.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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:P | VulDB |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 5.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
- CWE-404 Denial of Service
Affected Products
| Product | Versions |
|---|---|
Open5GSn/a |
|
References
- VDB-341732 | Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of servicevdb-entrytechnical-description
- VDB-341732 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #735339 | Open5GS SGWC v2.7.6 Denial of Servicethird-party-advisory
- https://github.com/open5gs/open5gs/issues/4230issue-tracking
- https://github.com/open5gs/open5gs/issues/4230#issue-3774173079exploitissue-tracking
- https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545fpatch
- https://github.com/open5gs/open5gs/product
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