SUSE-SU-2025:0744-1: moderate: Security update for openssh8.4

[SLE-SECURITY-UPDATES]

# Security update for openssh8.4

Announcement ID: SUSE-SU-2025:0744-1  
Release Date: 2025-02-28T14:39:39Z  
Rating: moderate  
References:

  * bsc#1186673
  * bsc#1213004
  * bsc#1213008
  * bsc#1214788
  * bsc#1216474
  * bsc#1218871
  * bsc#1221123
  * bsc#1222831
  * bsc#1237040

  
Cross-References:

  * CVE-2025-26465

  
CVSS scores:

  * CVE-2025-26465 ( SUSE ):  6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-26465 ( NVD ):  6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

  
Affected Products:

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

  
  
An update that solves one vulnerability and has eight security fixes can now be
installed.

## Description:

This update for openssh8.4 fixes the following issues:

  * CVE-2025-26465: Fixed a MitM attack against OpenSSH's VerifyHostKeyDNS-
    enabled client (bsc#1237040).

Other bugfixes:

  * Fix usage of local accelerator cards via openssl-ibmca (bsc#1216474,
    bsc#1218871).
  * Add patches from upstream to change the default value of UpdateHostKeys to
    Yes (unless VerifyHostKeyDNS is enabled) (bsc#1222831).
  * Fix hostbased ssh login failing occasionally with "signature unverified:
    incorrect signature" by fixing a typo in patch (bsc#1221123).
  * For now we don't ship the ssh-keycat command, but we need the patch for the
    other SELinux infrastructure (bsc#1214788).
  * Attempts to mitigate instances of secrets lingering in memory after a
    session exits (bsc#1213004, bsc#1213008, bsc#1186673).

## 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  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2025-744=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-744=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * openssh8.4-fips-8.4p1-8.16.1
    * openssh8.4-helpers-8.4p1-8.16.1
    * openssh8.4-server-8.4p1-8.16.1
    * openssh8.4-clients-debuginfo-8.4p1-8.16.1
    * openssh8.4-common-debuginfo-8.4p1-8.16.1
    * openssh8.4-helpers-debuginfo-8.4p1-8.16.1
    * openssh8.4-server-debuginfo-8.4p1-8.16.1
    * openssh8.4-8.4p1-8.16.1
    * openssh8.4-common-8.4p1-8.16.1
    * openssh8.4-clients-8.4p1-8.16.1
    * openssh8.4-debugsource-8.4p1-8.16.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * openssh8.4-fips-8.4p1-8.16.1
    * openssh8.4-helpers-8.4p1-8.16.1
    * openssh8.4-server-8.4p1-8.16.1
    * openssh8.4-clients-debuginfo-8.4p1-8.16.1
    * openssh8.4-common-debuginfo-8.4p1-8.16.1
    * openssh8.4-helpers-debuginfo-8.4p1-8.16.1
    * openssh8.4-server-debuginfo-8.4p1-8.16.1
    * openssh8.4-8.4p1-8.16.1
    * openssh8.4-common-8.4p1-8.16.1
    * openssh8.4-clients-8.4p1-8.16.1
    * openssh8.4-debugsource-8.4p1-8.16.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-26465.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1186673
  * https://bugzilla.suse.com/show_bug.cgi?id=1213004
  * https://bugzilla.suse.com/show_bug.cgi?id=1213008
  * https://bugzilla.suse.com/show_bug.cgi?id=1214788
  * https://bugzilla.suse.com/show_bug.cgi?id=1216474
  * https://bugzilla.suse.com/show_bug.cgi?id=1218871
  * https://bugzilla.suse.com/show_bug.cgi?id=1221123
  * https://bugzilla.suse.com/show_bug.cgi?id=1222831
  * https://bugzilla.suse.com/show_bug.cgi?id=1237040

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