CVE-2026-112273

Description

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.

References

https://www.vulncheck.com/advisories/libtins-through-4.6-heap-out-of-bounds-read-via-dns-compose-name

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-104300

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS