SUSE-SU-2026:20767-1: moderate: Security update for libssh

[SLE-SECURITY-UPDATES]

# Security update for libssh

Announcement ID: SUSE-SU-2026:20767-1  
Release Date: 2026-03-19T11:24:33Z  
Rating: moderate  
References:

  * bsc#1259377

  
Cross-References:

  * CVE-2026-3731

  
CVSS scores:

  * CVE-2026-3731 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-3731 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-3731 ( NVD ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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-2026-3731 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-3731 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * SUSE Linux Micro 6.1

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libssh fixes the following issue:

  * CVE-2026-3731: Denial of Service via out-of-bounds read in SFTP extension
    name handler (bsc#1259377).

## 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 6.1  
    zypper in -t patch SUSE-SLE-Micro-6.1-449=1

## Package List:

  * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64)
    * libssh4-0.10.6-slfo.1.1_5.1
    * libssh-config-0.10.6-slfo.1.1_5.1
    * libssh4-debuginfo-0.10.6-slfo.1.1_5.1
    * libssh-debugsource-0.10.6-slfo.1.1_5.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-3731.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259377

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