SUSE-SU-2026:22284-1: important: Security update for libssh2_org

[SLE-UPDATES]

# Security update for libssh2_org

Announcement ID: SUSE-SU-2026:22284-1  
Release Date: 2026-06-25T11:50:17Z  
Rating: important  
References:

  * bsc#1268530
  * bsc#1268531

  
Cross-References:

  * CVE-2026-55199
  * CVE-2026-55200

  
CVSS scores:

  * CVE-2026-55199 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-55199 ( NVD ):  8.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-55199 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-55199 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-55200 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-55200 ( NVD ):  9.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-55200 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-55200 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Micro 6.2

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for libssh2_org fixes the following issues

  * CVE-2026-55199: pre-Authentication DoS via SSH_MSG_EXT_INFO Handler
    (bsc#1268530).
  * CVE-2026-55200: out-of-Bounds write via Unchecked packet_length in
    transport.c (bsc#1268531).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-1078=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libssh2_org-debugsource-1.11.1-160000.4.1
    * libssh2-1-1.11.1-160000.4.1
    * libssh2-1-debuginfo-1.11.1-160000.4.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-55199.html
  * https://www.suse.com/security/cve/CVE-2026-55200.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1268530
  * https://bugzilla.suse.com/show_bug.cgi?id=1268531

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