SUSE-SU-2025:3897-1: low: Security update for libssh

[SLE-SECURITY-UPDATES]

# Security update for libssh

Announcement ID: SUSE-SU-2025:3897-1  
Release Date: 2025-10-31T14:55:41Z  
Rating: low  
References:

  * bsc#1249375

  
Cross-References:

  * CVE-2025-8277

  
CVSS scores:

  * CVE-2025-8277 ( SUSE ):  3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
  * CVE-2025-8277 ( NVD ):  3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libssh fixes the following issues:

  * CVE-2025-8277: memory exhaustion leading to client-side DoS due to improper
    memory management when KEX process is repeated with incorrect guesses
    (bsc#1249375).

## 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 Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-3897=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libssh-devel-doc-0.6.3-12.18.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-8277.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1249375

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