SUSE-SU-2025:20160-1: important: Security update for openssh

[SLE-UPDATES]

# Security update for openssh

Announcement ID: SUSE-SU-2025:20160-1  
Release Date: 2025-03-25T09:02:43Z  
Rating: important  
References:

  * bsc#1186673
  * bsc#1213004
  * bsc#1213008
  * bsc#1221063
  * bsc#1221928
  * bsc#1222840
  * bsc#1225904
  * bsc#1227456
  * bsc#1229010
  * bsc#1229072
  * bsc#1229449
  * bsc#1236826
  * bsc#1237040
  * bsc#1237041

  
Cross-References:

  * CVE-2025-26465
  * CVE-2025-26466

  
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
  * 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
  * CVE-2025-26466 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-26466 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-26466 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-26466 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Micro 6.0

  
  
An update that solves two vulnerabilities and has 12 fixes can now be installed.

## Description:

This update for openssh fixes the following issues:

  * CVE-2025-26465: Fixed MitM attack against OpenSSH's VerifyHostKeyDNS-enabled
    client (bsc#1237040).
  * CVE-2025-26466: Fixed DoS attack against OpenSSH's client and server
    (bsc#1237041).

Other bugfixes:

  * Fix ssh client segfault with GSSAPIKeyExchange=yes in ssh_kex2 due to gssapi
    proposal not being correctly initialized (bsc#1236826).
  * Add #include <stdlib.h> in some files added by the ldap patch to fix build
    with gcc14 (bsc#1225904).
  * Added missing struct initializer, added missing parameter (bsc#1222840).
  * Remove OPENSSL_HAVE_EVPGCM-ifdef, which is no longer supported by upstream
    (bsc#1221928).
  * Use %config(noreplace) for sshd_config. In any case, it's recommended to
    drop a file in sshd_config.d instead of editing sshd_config (bsc#1221063).
  * Add a patch to fix a regression introduced in 9.6 that makes X11 forwarding
    very slow (bsc#1229449).
  * Drop keycat binary that is not supported, except of the code that is used by
    other SELinux patches (bsc#1229072).
  * Fix RFC4256 implementation that keyboard-interactive authentication method
    can send instructions and sshd shows them to users (bsc#1229010).
  * Add attempts to mitigate instances of secrets lingering in memory after a
    session exits (bsc#1186673, bsc#1213004, bsc#1213008).
  * Remove empty line at the end of sshd-sle.pamd (bsc#1227456)

## 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 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-259=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * openssh-9.6p1-3.1
    * openssh-clients-debuginfo-9.6p1-3.1
    * openssh-common-9.6p1-3.1
    * openssh-debugsource-9.6p1-3.1
    * openssh-server-debuginfo-9.6p1-3.1
    * openssh-debuginfo-9.6p1-3.1
    * openssh-server-config-rootlogin-9.6p1-3.1
    * openssh-clients-9.6p1-3.1
    * openssh-fips-9.6p1-3.1
    * openssh-common-debuginfo-9.6p1-3.1
    * openssh-server-9.6p1-3.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-26465.html
  * https://www.suse.com/security/cve/CVE-2025-26466.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=1221063
  * https://bugzilla.suse.com/show_bug.cgi?id=1221928
  * https://bugzilla.suse.com/show_bug.cgi?id=1222840
  * https://bugzilla.suse.com/show_bug.cgi?id=1225904
  * https://bugzilla.suse.com/show_bug.cgi?id=1227456
  * https://bugzilla.suse.com/show_bug.cgi?id=1229010
  * https://bugzilla.suse.com/show_bug.cgi?id=1229072
  * https://bugzilla.suse.com/show_bug.cgi?id=1229449
  * https://bugzilla.suse.com/show_bug.cgi?id=1236826
  * https://bugzilla.suse.com/show_bug.cgi?id=1237040
  * https://bugzilla.suse.com/show_bug.cgi?id=1237041

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