{"id":"CVE-2026-40892","summary":"PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()","details":"PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsip_auth_create_digest2() in PJSIP when using pre-computed digest credentials (PJSIP_CRED_DATA_DIGEST). The function copies credential data using cred_info-\u003edata.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.","aliases":["GHSA-2wcg-w3c4-48r7"],"modified":"2026-08-12T16:24:08.259131Z","published":"2026-04-21T19:55:26.876Z","database_specific":{"cwe_ids":["CWE-121"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40892.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40892.json"},{"type":"ADVISORY","url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40892"},{"type":"FIX","url":"https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pjsip/pjproject","events":[{"introduced":"0"},{"fixed":"5a457451fa2712ba18e12b01738e8ff3af2b26fd"},{"fixed":"c82123ea6f3c3652bbc9ebd5e9e658c301451687"}],"database_specific":{"cpe":"cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.17"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["2.16","2.15","2.14","2.13","2.12","2.11","2.10"],"database_specific":{"vanir_signatures_modified":"2026-08-12T16:24:08Z","vanir_signatures":[{"signature_type":"Line","signature_version":"v1","source":"https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687","target":{"file":"pjsip/src/pjsip/sip_auth_client.c"},"deprecated":false,"digest":{"line_hashes":["271487805372020685281929672924788739023","143341940733911665328653855004538887896","39470024426347641986137587022818173795","143753489192855065967366424481963127456"],"threshold":0.9},"id":"CVE-2026-40892-90d1ec2f"},{"target":{"file":"pjsip/src/pjsip/sip_auth_client.c","function":"pjsip_auth_create_digest2"},"deprecated":false,"digest":{"function_hash":"94974654019773955036750536571538866115","length":6507},"id":"CVE-2026-40892-c123ba4b","signature_type":"Function","signature_version":"v1","source":"https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40892.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U"}]}