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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.

PUBLISHED Reserved 2026-01-28 | Published 2026-01-28 | Updated 2026-01-28 | Assigner VulDB




MEDIUM: 6.9CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
5.0AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C

Problem types

Denial of Service

Timeline

2026-01-11:Countermeasure disclosed
2026-01-28:Advisory disclosed
2026-01-28:VulDB entry created
2026-01-28:VulDB entry last update

Credits

FrankyLin (VulDB User) reporter

References

vuldb.com/?id.343193 (VDB-343193 | Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service) vdb-entry technical-description

vuldb.com/?ctiid.343193 (VDB-343193 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.738371 (Submit #738371 | Open5GS SGWC v2.7.6 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4266 issue-tracking

github.com/open5gs/open5gs/issues/4266 issue-tracking

github.com/open5gs/open5gs/issues/4266 exploit issue-tracking

github.com/open5gs/open5gs/commit/b19cf6a patch

cve.org (CVE-2026-1522)

nvd.nist.gov (CVE-2026-1522)

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