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CVE-2026-3731

CVE-2026-3731 · libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds

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

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

CVSS 6.9 · Medium · EPSS 1.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libssh

    Versions
    • 0.11.0: Affected
    • 0.11.1: Affected
    • 0.11.2: Affected
    • 0.11.3: Affected
    • 0.11.4: Not affected
    • 0.12.0: Not affected

    No fix published

  • libssh Debian:12

    Versions
    • 0.10.5-2
    • 0.10.5-3
    • 0.10.5-3+hurd.1
    • 0.10.6-0+deb12u1
    • 0.10.6-0+deb12u2
    Affected ranges
    • ECOSYSTEM: < 0.10.6-0+deb12u3

    Update to 0.10.6-0+deb12u3

  • libssh Debian:13

    Versions
    • 0.11.2-1
    • 0.11.2-1+deb13u1
    • 0.11.3-1
    Affected ranges
    • ECOSYSTEM: < 0.11.5-0+deb13u1

    Update to 0.11.5-0+deb13u1

  • libssh Debian:14

    Versions
    • 0.11.2-1
    • 0.11.3-1
    Affected ranges
    • ECOSYSTEM: < 0.12.0-1

    Update to 0.12.0-1

  • libssh Ubuntu:Pro:16.04:LTS

    Versions
    • 0.6.3-3ubuntu3
    • 0.6.3-4.1
    • 0.6.3-4.2
    • 0.6.3-4.2ubuntu1
    • 0.6.3-4.3
    • 0.6.3-4.3ubuntu0.1
    • 0.6.3-4.3ubuntu0.2
    • 0.6.3-4.3ubuntu0.5
    • 0.6.3-4.3ubuntu0.6
    • 0.6.3-4.3ubuntu0.6+esm1
    • 0.6.3-4.3ubuntu0.6+esm2
    • 0.6.3-4.3ubuntu0.6+esm3
    • 0.6.3-4.3ubuntu0.6+esm4
    Affected ranges
    • ECOSYSTEM: < 0.6.3-4.3ubuntu0.6+esm5

    Update to 0.6.3-4.3ubuntu0.6+esm5

  • libssh Ubuntu:Pro:18.04:LTS

    Versions
    • 0.7.5-1
    • 0.8.0~20170825.94fa1e38-1
    • 0.8.0~20170825.94fa1e38-1build1
    • 0.8.0~20170825.94fa1e38-1ubuntu0.1
    • 0.8.0~20170825.94fa1e38-1ubuntu0.2
    • 0.8.0~20170825.94fa1e38-1ubuntu0.5
    • 0.8.0~20170825.94fa1e38-1ubuntu0.6
    • 0.8.0~20170825.94fa1e38-1ubuntu0.7
    • 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3
    • 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm4
    • 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5
    • 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm6
    Affected ranges
    • ECOSYSTEM: < 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7

    Update to 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7

  • libssh Ubuntu:Pro:20.04:LTS

    Versions
    • 0.9.0-1ubuntu1
    • 0.9.0-1ubuntu4
    • 0.9.0-1ubuntu5
    • 0.9.3-2ubuntu1
    • 0.9.3-2ubuntu2
    • 0.9.3-2ubuntu2.1
    • 0.9.3-2ubuntu2.2
    • 0.9.3-2ubuntu2.3
    • 0.9.3-2ubuntu2.4
    • 0.9.3-2ubuntu2.5
    • 0.9.3-2ubuntu2.5+esm1
    • 0.9.3-2ubuntu2.5+esm2
    • 0.9.3-2ubuntu2.5+esm3
    Affected ranges
    • ECOSYSTEM: < 0.9.3-2ubuntu2.5+esm4

    Update to 0.9.3-2ubuntu2.5+esm4

  • libssh Ubuntu:22.04:LTS

    Versions
    • 0.9.6-1
    • 0.9.6-1build1
    • 0.9.6-2
    • 0.9.6-2build1
    • 0.9.6-2ubuntu0.22.04.1
    • 0.9.6-2ubuntu0.22.04.2
    • 0.9.6-2ubuntu0.22.04.3
    • 0.9.6-2ubuntu0.22.04.4
    • 0.9.6-2ubuntu0.22.04.5
    • 0.9.6-2ubuntu0.22.04.6
    Affected ranges
    • ECOSYSTEM: < 0.9.6-2ubuntu0.22.04.7

    Update to 0.9.6-2ubuntu0.22.04.7

  • libssh Ubuntu:24.04:LTS

    Versions
    • 0.10.5-3ubuntu1
    • 0.10.5-3ubuntu2
    • 0.10.6-2
    • 0.10.6-2build1
    • 0.10.6-2build2
    • 0.10.6-2ubuntu0.1
    • 0.10.6-2ubuntu0.2
    • 0.10.6-2ubuntu0.3
    Affected ranges
    • ECOSYSTEM: < 0.10.6-2ubuntu0.4

    Update to 0.10.6-2ubuntu0.4

  • libssh Ubuntu:25.10

    Versions
    • 0.11.1-1
    • 0.11.1-2
    • 0.11.2-1
    • 0.11.2-1build1
    • 0.11.2-1ubuntu0.1
    • 0.11.2-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: < 0.11.2-1ubuntu0.3

    Update to 0.11.2-1ubuntu0.3

  • libssh Ubuntu:26.04:LTS

    Versions
    • 0.11.2-1build1
    • 0.11.3-1
    • 0.11.3-1ubuntu1
    Affected ranges
    • ECOSYSTEM: < 0.11.3-1ubuntu2

    Update to 0.11.3-1ubuntu2

Original sources

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