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CVE-2026-8836

CVE-2026-8836 · lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow

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

A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.

CVSS 9.3 · Critical · EPSS 1.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • lwip

    Versions
    • 2.1.0: Affected
    • 2.1.1: Affected
    • 2.1.2: Affected
    • 2.1.3: Affected
    • 2.2.0: Affected
    • 2.2.1: Affected

    No fix published

  • lwip Debian:12

    Versions
    • 2.1.3+dfsg1-2
    • 2.1.3+dfsg1-3
    • 2.1.3+dfsg1-4
    • 2.2.0+dfsg1-1
    • 2.2.0+dfsg1-2
    • 2.2.0+dfsg1-3
    • 2.2.0+dfsg1-4
    • 2.2.0+dfsg1-5
    • 2.2.0+dfsg1-6
    • 2.2.0+dfsg1-6.1
    • 2.2.0+dfsg1-6.1~exp1
    • 2.2.0+dfsg1-7
    • 2.2.0+dfsg1-8
    • 2.2.0+dfsg1-9
    • 2.2.1+dfsg1-1
    • 2.2.1+dfsg1-2
    • 2.2.1+dfsg1-3
    • 2.2.1+dfsg1-4
    • 2.2.1+dfsg1-5
    • 2.2.1+dfsg1-6
    • 2.2.1+dfsg1-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lwip Debian:13

    Versions
    • 2.2.1+dfsg1-1
    Affected ranges
    • ECOSYSTEM: < 2.2.1+dfsg1-1+deb13u1

    Update to 2.2.1+dfsg1-1+deb13u1

  • lwip Debian:14

    Versions
    • 2.2.1+dfsg1-1
    • 2.2.1+dfsg1-2
    • 2.2.1+dfsg1-3
    • 2.2.1+dfsg1-4
    Affected ranges
    • ECOSYSTEM: < 2.2.1+dfsg1-5

    Update to 2.2.1+dfsg1-5

  • lwip Ubuntu:Pro:20.04:LTS

    Versions
    • 2.1.2-3
    • 2.1.2-5.1
    • 2.1.2+dfsg1-1
    • 2.1.2+dfsg1-4
    Affected ranges
    • ECOSYSTEM: < 2.1.2+dfsg1-4ubuntu0.1~esm1

    Update to 2.1.2+dfsg1-4ubuntu0.1~esm1

  • lwip Ubuntu:Pro:22.04:LTS

    Versions
    • 2.1.2+dfsg1-8
    • 2.1.2+dfsg1-9
    • 2.1.3+dfsg1-1
    Affected ranges
    • ECOSYSTEM: < 2.1.3+dfsg1-1ubuntu0.1~esm1

    Update to 2.1.3+dfsg1-1ubuntu0.1~esm1

  • lwip Ubuntu:Pro:24.04:LTS

    Versions
    • 2.1.3+dfsg1-2
    • 2.1.3+dfsg1-4
    • 2.2.0+dfsg1-2
    • 2.2.0+dfsg1-3
    • 2.2.0+dfsg1-4
    • 2.2.0+dfsg1-5
    • 2.2.0+dfsg1-6
    • 2.2.0+dfsg1-6.1
    • 2.2.0+dfsg1-6.1build1
    • 2.2.0+dfsg1-6.1build2
    Affected ranges
    • ECOSYSTEM: < 2.2.0+dfsg1-6.1ubuntu0.1~esm1

    Update to 2.2.0+dfsg1-6.1ubuntu0.1~esm1

  • lwip Ubuntu:25.10

    Versions
    • 2.2.1+dfsg1-1
    • 2.2.1+dfsg1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lwip Ubuntu:26.10

    Versions
    • 2.2.1+dfsg1-4
    • 2.2.1+dfsg1-5
    • 2.2.1+dfsg1-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lwip Ubuntu:Pro:26.04:LTS

    Versions
    • 2.2.1+dfsg1-2
    • 2.2.1+dfsg1-3
    • 2.2.1+dfsg1-4
    Affected ranges
    • ECOSYSTEM: < 2.2.1+dfsg1-4ubuntu0.1~esm1

    Update to 2.2.1+dfsg1-4ubuntu0.1~esm1

Original sources

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