{"id":"CVE-2026-115863","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115863","generatedAt":"2026-10-28T03:39:31.813Z","title":"ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message.","description":"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.","published":"2026-10-23T18:17:22.000Z","lastModified":"2026-10-23T19:43:46.000Z","status":"Awaiting Analysis","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.6,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"cwe":["CWE-121"],"affected":[],"epss":{"score":0.00299,"percentile":0.22475,"date":"2026-10-27","history":[{"date":"2026-10-24","score":0.00414,"percentile":0.34652}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-23T18:17:22.000Z","detail":{"score":"7.6","severity":"HIGH","publishedAt":"2026-10-23T18:17:21.757Z"},"summary":"New CVE, high severity (CVSS 7.6)."}],"references":[{"url":"https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=bb06c47101ca243fa5c04fb4b03fe2a12420d280","source":"cve@mitre.org"},{"url":"https://git.kernel.org/pub/scm/network/connman/connman.git/tree/gdhcp/client.c","source":"cve@mitre.org"},{"url":"https://lore.kernel.org/connman/179274561161.81299.4579745057858200074@pm.me/","source":"cve@mitre.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115863","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}