{"id":"CVE-2026-112273","title":"libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name","summary":"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 deliv…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-125"],"vendor":"libtins","product":"libtins","affected":["libtins <= 4.6"],"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-22T02:49:37.004511Z"},"exploitAvailable":true,"published":"2026-10-19","updated":"2026-10-22","sourceUpdated":"2026-10-22T02:51:25.912Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112273","references":[{"url":"https://hackmd.io/@haindpwn/libtins-dns-name-parsing-oob-read"},{"url":"https://github.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L338-L389"},{"url":"https://github.com/mfontanini/libtins"},{"url":"https://www.vulncheck.com/advisories/libtins-through-4.6-heap-out-of-bounds-read-via-dns-compose-name","label":"VulnCheck Advisory: libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name"}],"tags":["cve.org","exploit-available"],"epss":0.00565,"epssPercentile":0.46771,"ingestedAt":"2026-10-19T14:30:01.073Z","slug":"CVE-2026-112273","body":"## Overview\n\nlibtins 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.\n\n## Affected\n\n- `libtins <= 4.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":227491,"id":"CVE-2026-112273","ts":1792639555590,"field":"exploit_available","old":"false","new":"true"}]}