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CVE-2026-7598

CVE-2026-7598 · libssh2 userauth.c userauth_password integer overflow

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

A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

CVSS 6.9 · Medium · EPSS 0.8% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libssh2

    Versions
    • 1.11.0: Affected
    • 1.11.1: Affected

    No fix published

  • libssh2 Debian:12

    Versions
    • 1.10.0-3
    Affected ranges
    • ECOSYSTEM: < 1.10.0-3+deb12u1

    Update to 1.10.0-3+deb12u1

  • libssh2 Debian:13

    Versions
    • 1.11.1-1
    Affected ranges
    • ECOSYSTEM: < 1.11.1-1+deb13u1

    Update to 1.11.1-1+deb13u1

  • libssh2 Debian:14

    Versions
    • 1.11.1-1
    • 1.11.1-2
    Affected ranges
    • ECOSYSTEM: < 1.11.1-3

    Update to 1.11.1-3

  • libssh2 Ubuntu:Pro:14.04:LTS

    Versions
    • 1.4.3-1
    • 1.4.3-2
    • 1.4.3-2ubuntu0.1
    • 1.4.3-2ubuntu0.2
    • 1.4.3-2ubuntu0.2+esm1
    • 1.4.3-2ubuntu0.2+esm2
    • 1.4.3-2ubuntu0.2+esm3
    • 1.4.3-2ubuntu0.2+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libssh2 Ubuntu:Pro:16.04:LTS

    Versions
    • 1.5.0-2
    • 1.5.0-2ubuntu0.1
    • 1.5.0-2ubuntu0.1+esm1
    • 1.5.0-2ubuntu0.1+esm2
    • 1.5.0-2ubuntu0.1+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libssh2 Ubuntu:Pro:18.04:LTS

    Versions
    • 1.8.0-1
    • 1.8.0-1ubuntu0.1
    • 1.8.0-1ubuntu0.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libssh2 Ubuntu:Pro:20.04:LTS

    Versions
    • 1.8.0-2.1build1
    • 1.8.0-2.1ubuntu0.1
    • 1.8.0-2.1ubuntu0.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libssh2 Ubuntu:22.04:LTS

    Versions
    • 1.9.0-3
    • 1.10.0-2
    • 1.10.0-2build1
    • 1.10.0-3
    • 1.10.0-3ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libssh2 Ubuntu:24.04:LTS

    Versions
    • 1.11.0-2
    • 1.11.0-3
    • 1.11.0-4
    • 1.11.0-4.1build1
    • 1.11.0-4.1build2
    Affected ranges
    • ECOSYSTEM: < 1.11.0-4.1ubuntu0.24.04.1

    Update to 1.11.0-4.1ubuntu0.24.04.1

  • libssh2 Ubuntu:25.10

    Versions
    • 1.11.1-1
    • 1.11.1-1build1
    Affected ranges
    • ECOSYSTEM: < 1.11.1-1ubuntu0.25.10.1

    Update to 1.11.1-1ubuntu0.25.10.1

  • libssh2 Ubuntu:26.04:LTS

    Versions
    • 1.11.1-1build1
    • 1.11.1-1build2
    Affected ranges
    • ECOSYSTEM: < 1.11.1-1ubuntu0.26.04.1

    Update to 1.11.1-1ubuntu0.26.04.1

Original sources

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