{"id":"CVE-2025-15539","summary":"Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service","details":"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.","modified":"2026-08-12T15:13:17.831443Z","published":"2026-01-18T23:32:06.758Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15539.json","unresolved_ranges":[{"extracted_events":[{"introduced":"2.7.3"},{"last_affected":"2.7.3"},{"introduced":"2.7.4"},{"last_affected":"2.7.4"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"VulDB","cwe_ids":["CWE-404"]},"references":[{"type":"WEB","url":"https://github.com/open5gs/open5gs/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15539.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-15539"},{"type":"ADVISORY","url":"https://vuldb.com/?id.341732"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.735339"},{"type":"REPORT","url":"https://github.com/open5gs/open5gs/issues/4230"},{"type":"REPORT","url":"https://github.com/open5gs/open5gs/issues/4230#issue-3774173079"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.341732"},{"type":"FIX","url":"https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open5gs/open5gs","events":[{"introduced":"0"},{"fixed":"b4707272c1caf6a7d4dca905694ea55557a0545f"}],"database_specific":{"cpe":"cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"2.7.6"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["2.7.0","2.7.1","2.7.2","2.7.5","2.7.6","v2.7.2","v2.7.1","v2.7.0","v2.6.6","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.4.9","v2.4.8","v2.4.7","v2.4.5","v2.4.4","v2.4.3","v2.4.1","v2.4.0","v2.3.6","v2.3.2","v2.3.0","v2.2.9","v2.2.8","v2.2.7","v2.2.6","v2.2.1","v2.2.0","v2.1.7","v2.1.5","v2.1.4","v2.1.3","v2.1.1","v2.1.0","v2.0.22","v2.0.18","v2.0.0","v1.3.0","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.0","v1.0.0","v0.5.2","v0.5.1","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.3.10","v0.3.8","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-15539.json","vanir_signatures_modified":"2026-08-12T15:13:17Z","vanir_signatures":[{"signature_type":"Line","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f","target":{"file":"src/sgwc/s11-handler.c"},"deprecated":false,"digest":{"line_hashes":["313669102662231711030006735957649972120","43246333233299638694869726788369963575","316241755027875517435813635740419606862","92254811188144562291646303124244870227","241406018270198916868878378804202062155","290637539197315227551026379223595101076","1250859378627922729799997938905502133","116997803931702360201172706296080329181","118825016005470358829092605123661352479","176644275280501722931395847582265742487","260429860762159756771362083143653962913","82386538622618925668292812438065549709","28862460947784211119434408827426956446","247745065171475967776769060353417820907","197253493880040242493215204027617494981","62831571897844475761006753600654002566","241614931255065723995297317483363737015","271213258520105027318910422329761679817","171154762923474182970074016441109013992"],"threshold":0.9},"id":"CVE-2025-15539-7489a089"},{"source":"https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f","target":{"file":"src/sgwc/s11-handler.c","function":"sgwc_s11_handle_downlink_data_notification_ack"},"deprecated":false,"digest":{"function_hash":"109559252747677377181125104709764980028","length":1116},"id":"CVE-2025-15539-e3da0d42","signature_type":"Function","signature_version":"v1"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}