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CVE-2025-26618

CVE-2025-26618 · SSH SFTP packet size not verified properly in Erlang OTP

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

Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.

CVSS 7.0 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • erlang

    Versions
    • >= OTP-27.0.0, < OTP-27.2.4: Affected
    • >= OTP-26.0.0.0, < OTP-26.2.5.9: Affected
    • < OTP-25.3.2.18: Affected

    No fix published

  • erlang Debian:12

    Versions
    • 1:25.2.3+dfsg-1
    Affected ranges
    • ECOSYSTEM: < 1:25.2.3+dfsg-1+deb12u1

    Update to 1:25.2.3+dfsg-1+deb12u1

  • erlang Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:27.2.4+dfsg-1

    Update to 1:27.2.4+dfsg-1

  • erlang Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:27.2.4+dfsg-1

    Update to 1:27.2.4+dfsg-1

  • erlang Ubuntu:Pro:14.04:LTS

    Versions
    • 1:16.b.1-dfsg-4ubuntu1
    • 1:16.b.2-dfsg-1ubuntu1
    • 1:16.b.2-dfsg-2ubuntu1
    • 1:16.b.3-dfsg-1ubuntu1
    • 1:16.b.3-dfsg-1ubuntu2
    • 1:16.b.3-dfsg-1ubuntu2.1
    • 1:16.b.3-dfsg-1ubuntu2.2
    • 1:16.b.3-dfsg-1ubuntu2.2+esm1
    • 1:16.b.3-dfsg-1ubuntu2.2+esm2
    Affected ranges
    • ECOSYSTEM: < 1:16.b.3-dfsg-1ubuntu2.2+esm3

    Update to 1:16.b.3-dfsg-1ubuntu2.2+esm3

  • erlang Ubuntu:Pro:16.04:LTS

    Versions
    • 1:18.0-dfsg-1ubuntu1
    • 1:18.0-dfsg-1ubuntu2
    • 1:18.2-dfsg-2ubuntu1
    • 1:18.3-dfsg-1ubuntu1
    • 1:18.3-dfsg-1ubuntu2
    • 1:18.3-dfsg-1ubuntu3
    • 1:18.3-dfsg-1ubuntu3.1
    • 1:18.3-dfsg-1ubuntu3.1+esm1
    • 1:18.3-dfsg-1ubuntu3.1+esm2
    • 1:18.3-dfsg-1ubuntu3.1+esm3
    Affected ranges
    • ECOSYSTEM: < 1:18.3-dfsg-1ubuntu3.1+esm4

    Update to 1:18.3-dfsg-1ubuntu3.1+esm4

  • erlang Ubuntu:Pro:18.04:LTS

    Versions
    • 1:20.0.4+dfsg-1ubuntu1
    • 1:20.1.2+dfsg-1ubuntu1
    • 1:20.1.3+dfsg-1ubuntu1
    • 1:20.1.4+dfsg-1ubuntu1
    • 1:20.1.5+dfsg-1ubuntu1
    • 1:20.1.6+dfsg-1ubuntu1
    • 1:20.1.7+dfsg-1ubuntu1
    • 1:20.2.1+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu2
    • 1:20.2.2+dfsg-1ubuntu2+esm1
    • 1:20.2.2+dfsg-1ubuntu2+esm2
    • 1:20.2.2+dfsg-1ubuntu2+esm3
    Affected ranges
    • ECOSYSTEM: < 1:20.2.2+dfsg-1ubuntu2+esm4

    Update to 1:20.2.2+dfsg-1ubuntu2+esm4

  • erlang Ubuntu:20.04:LTS

    Versions
    • 1:22.0.7+dfsg-1build1
    • 1:22.2+dfsg-1
    • 1:22.2.1+dfsg-1
    • 1:22.2.2+dfsg-1
    • 1:22.2.3+dfsg-1
    • 1:22.2.3+dfsg-2
    • 1:22.2.4+dfsg-1
    • 1:22.2.7+dfsg-1
    • 1:22.2.7+dfsg-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: < 1:22.2.7+dfsg-1ubuntu0.3

    Update to 1:22.2.7+dfsg-1ubuntu0.3

  • erlang Ubuntu:22.04:LTS

    Versions
    • 1:23.2.6+dfsg-1build1
    • 1:24.1.1+dfsg-1
    • 1:24.1.4+dfsg-1
    • 1:24.1.5+dfsg-1
    • 1:24.1.5+dfsg-1ubuntu1
    • 1:24.2+dfsg-1
    • 1:24.2.1+dfsg-1
    • 1:24.2.1+dfsg-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: < 1:24.2.1+dfsg-1ubuntu0.2

    Update to 1:24.2.1+dfsg-1ubuntu0.2

  • erlang Ubuntu:24.04:LTS

    Versions
    • 1:25.2.3+dfsg-1
    • 1:25.3.2.8+dfsg-1
    • 1:25.3.2.8+dfsg-1ubuntu1
    • 1:25.3.2.8+dfsg-1ubuntu3
    • 1:25.3.2.8+dfsg-1ubuntu4
    Affected ranges
    • ECOSYSTEM: < 1:25.3.2.8+dfsg-1ubuntu4.1

    Update to 1:25.3.2.8+dfsg-1ubuntu4.1

Original sources

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