{"schema":"threatline.record/2","record":{"id":"CVE-2026-115863","aliases":[],"summary":"ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message. This occurs in get_domains in gdhcp/client.c. It copies a fixed NS_MAXDNAME (1025) bytes from a DHCPv6 DOMAIN_LIST (op","details":"ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message. This occurs in get_domains in gdhcp/client.c. It copies a fixed NS_MAXDNAME (1025) bytes from a DHCPv6 DOMAIN_LIST (option 24) value into a 1026-byte stack buffer dns_name regardless of the actual option length, then walks DNS labels with an unbounded \"c += jump + 1\" loop. A crafted DHCPv6 REPLY with a DOMAIN_LIST option of >= 1025 non-zero bytes makes the label walk leave the buffer and read/write '.' past its end in attacker-chosen strides. An on-link attacker can trigger this without authentication via a forged Router Advertisement (O=1) and a forged DHCPv6 REPLY matching xid/CLIENTID with a long DOMAIN_LIST. The impact is unauthenticated on-link crash of connmand (runs as root). This was introduced in bb06c47.","categories":["Unclassified"],"product":"ConnMan","vendor":"ConnMan","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115863","source_modified_at":"2026-10-23T17:35:18.517Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"ConnMan","vendor":"ConnMan","versions":[{"lessThanOrEqual":"2.0","status":"affected","version":"0","versionType":"custom"}],"defaultStatus":"unknown"}],"fixed_versions":[],"cvss":7.6,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00414,"percentile":0.34652,"score_date":"2026-10-24"},"published_at":"2026-10-23T17:35:18.517Z","modified_at":"2026-10-23T17:35:18.517Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115863","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:35:18.517Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115863","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://lore.kernel.org/connman/179274561161.81299.4579745057858200074@pm.me/","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://git.kernel.org/pub/scm/network/connman/connman.git/tree/gdhcp/client.c","tags":["product"]},{"source":"CVE List","url":"https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=bb06c47101ca243fa5c04fb4b03fe2a12420d280","tags":["product"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T17:35:18.517Z","content_hash":"219ba0d021115576784f34bb79e1788dda58613421028871534fe6dd3f2db7c6"}}