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CVE-2026-76918

CVE-2026-76918 · Heap-based Buffer Overflow in Wireshark

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

SSH protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS 5.5 · Medium · EPSS 0.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • wireshark

    Versions
    • ≥ 4.6.0, < 4.6.8: Affected (semver)
    • ≥ 4.4.0, < 4.4.18: Affected (semver)

    Update to 4.4.18; Update to 4.6.8

  • wireshark Debian:12

    Versions
    • 4.0.10-1
    • 4.0.11-1
    • 4.0.11-1~deb12u1
    • 4.0.17-0+deb12u1
    • 4.0.17-0+deb12u2
    • 4.0.17-0+deb12u3
    • 4.0.3-1
    • 4.0.5-1~exp1
    • 4.0.6-1
    • 4.0.6-1~deb12u1
    • 4.0.6-1~exp1
    • 4.0.7-1
    • 4.0.8-1
    • 4.2.0-1
    • 4.2.0-1~exp0
    • 4.2.0~rc3-1~exp1
    • 4.2.2-1
    • 4.2.2-1.1
    • 4.2.2-1.1~exp1
    • 4.2.4-1
    • 4.2.5-1
    • 4.2.5-2
    • 4.2.6-1
    • 4.4.0-0exp1
    • 4.4.0-0exp2
    • 4.4.0-1
    • 4.4.1-1
    • 4.4.2-1
    • 4.4.3-1
    • 4.4.4-1
    • 4.4.5-1
    • 4.4.6-1
    • 4.4.6-2
    • 4.4.7-0exp1
    • 4.4.7-1
    • 4.4.8-0exp1
    • 4.4.9-1
    • 4.6.0-0exp1
    • 4.6.0-1
    • 4.6.0~rc1-0exp1
    • 4.6.0~rc1-0exp2
    • 4.6.1-1
    • 4.6.1-2
    • 4.6.2-1
    • 4.6.2-3
    • 4.6.3-1
    • 4.6.4-1
    • 4.6.5-1
    • 4.6.6-1
    • 4.6.6-2
    • 4.6.9-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Debian:13

    Versions
    • 4.4.13-0+deb13u1
    • 4.4.14-0+deb13u1
    • 4.4.15-0+deb13u1
    • 4.4.16-0+deb13u1
    • 4.4.7-1
    • 4.4.8-0exp1
    • 4.4.9-1
    Affected ranges
    • ECOSYSTEM: < 4.4.18-0+deb13u1

    Update to 4.4.18-0+deb13u1

  • wireshark Debian:14

    Versions
    • 4.4.7-1
    • 4.4.8-0exp1
    • 4.4.9-1
    • 4.6.0-0exp1
    • 4.6.0-1
    • 4.6.0~rc1-0exp1
    • 4.6.0~rc1-0exp2
    • 4.6.1-1
    • 4.6.1-2
    • 4.6.2-1
    • 4.6.2-3
    • 4.6.3-1
    • 4.6.4-1
    • 4.6.5-1
    • 4.6.6-1
    • 4.6.6-2
    Affected ranges
    • ECOSYSTEM: < 4.6.9-1

    Update to 4.6.9-1

  • wireshark Ubuntu:Pro:14.04:LTS

    Versions
    • 1.10.2-1
    • 1.10.3-1
    • 1.10.5-1ubuntu1
    • 1.10.5-2
    • 1.10.6-1
    • 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1
    • 2.6.3-1~ubuntu14.04.1
    • 2.6.4-2~ubuntu14.04.1
    • 2.6.5-1~ubuntu14.04.1
    • 2.6.6-1~ubuntu14.04.0
    • 2.6.8-1~ubuntu14.04.0~esm1
    • 2.6.10-1~ubuntu14.04.0~esm1
    • 2.6.10-1~ubuntu14.04.0~esm2
    • 2.6.10-1~ubuntu14.04.0~esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:Pro:16.04:LTS

    Versions
    • 1.12.7+g7fc8978-1
    • 1.12.8+g5b6e543-2
    • 2.0.1+g59ea380-3build1
    • 2.0.2+ga16e22e-1
    • 2.2.6+g32dac6a-2ubuntu0.16.04
    • 2.6.3-1~ubuntu16.04.1
    • 2.6.4-2~ubuntu16.04.0
    • 2.6.5-1~ubuntu16.04.0
    • 2.6.6-1~ubuntu16.04.0
    • 2.6.8-1~ubuntu16.04.0
    • 2.6.10-1~ubuntu16.04.0
    • 2.6.10-1~ubuntu16.04.0+esm1
    • 2.6.10-1~ubuntu16.04.0+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:Pro:18.04:LTS

    Versions
    • 2.4.2-1
    • 2.4.3-1
    • 2.4.4-1
    • 2.4.5-1
    • 2.6.3-1~ubuntu18.04.1
    • 2.6.4-2~ubuntu18.04.0
    • 2.6.5-1~ubuntu18.04.0
    • 2.6.6-1~ubuntu18.04.0
    • 2.6.8-1~ubuntu18.04.0
    • 2.6.10-1~ubuntu18.04.0
    • 2.6.10-1~ubuntu18.04.0+esm1
    • 2.6.10-1~ubuntu18.04.0+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:Pro:20.04:LTS

    Versions
    • 3.0.5-1
    • 3.0.7-1
    • 3.2.1-1
    • 3.2.2-1
    • 3.2.3-1
    • 3.2.3-1ubuntu0.1~esm1
    • 3.2.3-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:Pro:22.04:LTS

    Versions
    • 3.4.7-1~exp1
    • 3.4.9-1
    • 3.6.2-1ubuntu1
    • 3.6.2-2
    • 3.6.2-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:24.04:LTS

    Versions
    • 4.0.8-1
    • 4.0.10-1
    • 4.0.11-1
    • 4.2.0-1
    • 4.2.2-1
    • 4.2.2-1.1build1
    • 4.2.2-1.1build2
    • 4.2.2-1.1build3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:26.10

    Versions
    • 4.6.4-1
    • 4.6.6-1
    • 4.6.6-2
    • 4.6.6-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wireshark Ubuntu:26.04:LTS

    Versions
    • 4.4.7-1
    • 4.6.0-1
    • 4.6.1-2
    • 4.6.2-3
    • 4.6.3-1
    • 4.6.4-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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