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CVE-2026-112273

CVE-2026-112273 · libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.9 · Medium · EPSS 0.5%

Published
Updated

Stack: system

Affected products and versions

  • libtins

    Versions
    • ≥ 0, ≤ 4.6: Affected (custom)

    No fix published

  • libtins Debian:12

    Versions
    • 4.0-1
    • 4.5-1
    • 4.5-1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Debian:13

    Versions
    • 4.5-1
    • 4.5-1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Debian:14

    Versions
    • 4.5-1
    • 4.5-1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:18.04:LTS

    Versions
    • 3.4-2
    • 3.4-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:20.04:LTS

    Versions
    • 4.0-1
    • 4.0-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:22.04:LTS

    Versions
    • 4.0-1build1
    • 4.0-1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:24.04:LTS

    Versions
    • 4.0-1build2
    • 4.5-1
    • 4.5-1build1
    • 4.5-1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:26.10

    Versions
    • 4.5-1.1
    • 4.5-1.1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtins Ubuntu:26.04:LTS

    Versions
    • 4.5-1build2
    • 4.5-1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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