SUSE-SU-2026:21107-1: important: Security update for openssl-3

Thu Apr 16 08:30:36 UTC 2026

# Security update for openssl-3

Announcement ID: SUSE-SU-2026:21107-1  
Release Date: 2026-04-13T16:22:41Z  
Rating: important  
References:

  * bsc#1259652
  * bsc#1260441
  * bsc#1260442
  * bsc#1260443
  * bsc#1260444
  * bsc#1260445
  * bsc#1261678
  * jsc#PED-15724

Cross-References:

  * CVE-2026-2673
  * CVE-2026-28387
  * CVE-2026-28388
  * CVE-2026-28389
  * CVE-2026-28390
  * CVE-2026-31789
  * CVE-2026-31790

CVSS scores:

  * CVE-2026-2673 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-2673 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-2673 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-28387 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-28388 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-28389 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-28389 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-28390 ( SUSE ):  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
  * CVE-2026-28390 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-28390 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-31789 ( SUSE ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-31790 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-31790 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Products:

  * SUSE Linux Micro 6.2

An update that solves seven vulnerabilities and contains one feature can now be
installed.

## Description:

This update for openssl-3 fixes the following issues:

Security issues fixed:

  * CVE-2026-2673: TLS 1.3 servers may choose unexpected key agreement group
    (bsc#1259652).
  * CVE-2026-28387: potential use-after-free in DANE client code (bsc#1260441).
  * CVE-2026-28388: NULL pointer dereference when processing a delta
    (bsc#1260442).
  * CVE-2026-28389: possible NULL pointer dereference when processing CMS
    KeyAgreeRecipientInfo (bsc#1260443).
  * CVE-2026-28390: NULL pointer dereference during processing of a crafted CMS
    EnvelopedData message with KeyTransportRecipientInfo (bsc#1261678).
  * CVE-2026-31789: heap buffer overflow in hexadecimal conversion
    (bsc#1260444).
  * CVE-2026-31790: incorrect failure handling in RSA KEM RSASVE encapsulation
    (bsc#1260445).

Other updates and bugfixes:

  * Enable MD2 in legacy provider (jsc#PED-15724).

## 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-6.2-547=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libopenssl3-3.5.0-160000.7.1
    * libopenssl-3-fips-provider-debuginfo-3.5.0-160000.7.1
    * openssl-3-debugsource-3.5.0-160000.7.1
    * libopenssl-3-fips-provider-3.5.0-160000.7.1
    * openssl-3-debuginfo-3.5.0-160000.7.1
    * openssl-3-3.5.0-160000.7.1
    * libopenssl3-debuginfo-3.5.0-160000.7.1
    * libopenssl-3-devel-3.5.0-160000.7.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-2673.html
  * https://www.suse.com/security/cve/CVE-2026-28387.html
  * https://www.suse.com/security/cve/CVE-2026-28388.html
  * https://www.suse.com/security/cve/CVE-2026-28389.html
  * https://www.suse.com/security/cve/CVE-2026-28390.html
  * https://www.suse.com/security/cve/CVE-2026-31789.html
  * https://www.suse.com/security/cve/CVE-2026-31790.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259652
  * https://bugzilla.suse.com/show_bug.cgi?id=1260441
  * https://bugzilla.suse.com/show_bug.cgi?id=1260442
  * https://bugzilla.suse.com/show_bug.cgi?id=1260443
  * https://bugzilla.suse.com/show_bug.cgi?id=1260444
  * https://bugzilla.suse.com/show_bug.cgi?id=1260445
  * https://bugzilla.suse.com/show_bug.cgi?id=1261678
  * https://jira.suse.com/browse/PED-15724

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