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.
History

Thu, 22 Oct 2026 03:30:00 +0000


Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Libtins
Libtins libtins
Vendors & Products Libtins
Libtins libtins

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-19T13:55:20.684Z

Updated: 2026-10-22T02:51:25.912Z

Reserved: 2026-10-19T13:25:28.347Z

Link: CVE-2026-112273

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:05.080

Modified: 2026-10-22T03:16:36.680

Link: CVE-2026-112273

cve-icon Redhat

No data.