CVE-2026-112273 PUBLISHED

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.

• HaiND from the Post and Telecommunication Institute of Technology finder

• https://hackmd.io/@haindpwn/libtins-dns-name-parsing-oob-read
• https://github.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L338-L389
• https://github.com/mfontanini/libtins
• VulnCheck Advisory: libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name

• Out-of-bounds Read CWE