{"id":"CVE-2026-112273","summary":"libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name","details":"libtins through 4.6 contains a heap out-of-bounds read vulnerability in DNS::compose_name in src/dns.cpp that allows remote attackers to read past the packet buffer by sending a label ending exactly at the packet end. Attackers can deliver crafted DNS packets whose additional, answer, or authority records trigger a one-byte read when parsed, crashing applications on hardened allocators.","modified":"2026-10-21T02:55:54.518072938Z","published":"2026-10-19T13:55:20.684Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112273.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112273.json"},{"type":"PACKAGE","url":"https://github.com/mfontanini/libtins"},{"type":"ARTICLE","url":"https://github.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L338-L389"},{"type":"ADVISORY","url":"https://hackmd.io/@haindpwn/libtins-dns-name-parsing-oob-read"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112273"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/libtins-through-4.6-heap-out-of-bounds-read-via-dns-compose-name"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mfontanini/libtins","events":[{"introduced":"0"},{"last_affected":"2d2f7012d9f3a16d684a55ba39f1215b6aef5429"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"last_affected":"4.6"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}}],"versions":["v4.6","v4.5","v4.4","v4.3","v4.2","v4.1","v3.4","v3.3","v3.2","v3.1","v3.0","v2.0","v1.2","v1.0","v0.3","v0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112273.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:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}