CVE-2026-1522
Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jan 28, 2026
- Updated
- Feb 23, 2026
- Reserved
- Jan 28, 2026
Description
A weakness has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This patch is called b19cf6a. Applying a patch is advised to resolve this issue. 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-343193 | Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of servicevdb-entrytechnical-description
- VDB-343193 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #738371 | Open5GS SGWC v2.7.6 Denial of Servicethird-party-advisory
- https://github.com/open5gs/open5gs/issues/4266issue-tracking
- https://github.com/open5gs/open5gs/issues/4266#event-21968568116issue-tracking
- https://github.com/open5gs/open5gs/issues/4266#issue-3794991595exploitissue-tracking
- https://github.com/open5gs/open5gs/commit/b19cf6apatch
- https://github.com/open5gs/open5gs/product
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