| Title | Open5GS SGWC v2.7.6 Denial of Service |
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| Description | Open5GS SGW-C crashes on a malformed GTPv2-C Create Session Request where the Bearer Contexts To Be Created includes an S1-U eNB F-TEID whose flags byte is zero (no IPv4/IPv6). The handler sgwc_s11_handle_create_session_request calls ogs_gtp2_f_teid_to_ip and asserts on OGS_OK, leading to process abort:
Assert location: src/sgwc/s11-handler.c:346
Fatal log example: Assertion 'OGS_OK == ogs_gtp2_f_teid_to_ip(enb_s1u_teid, &dl_tunnel->remote_ip)' failed. |
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| Source | ⚠️ https://github.com/open5gs/open5gs/issues/4203 |
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| User | ZiyuLin (UID 93568) |
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| Submission | 12/31/2025 04:01 (3 months ago) |
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| Moderation | 01/01/2026 11:51 (1 day later) |
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| Status | Accepted |
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| VulDB entry | 339339 [Open5GS up to 2.7.6 GTPv2-C F-TEID src/sgwc/s11-handler.c sgwc_s11_handle_create_session_request denial of service] |
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| Points | 20 |
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