SUSE-SU-2026:24232-1: moderate: Security update for stunnel

[SLE-SECURITY-UPDATES]

# Security update for stunnel

Announcement ID: SUSE-SU-2026:24232-1  
Release Date: 2026-10-12T08:44:51Z  
Rating: moderate  
References:

  * bsc#1274206
  * bsc#1274207

  
Cross-References:

  * CVE-2026-70367
  * CVE-2026-70368

  
CVSS scores:

  * CVE-2026-70367 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-70367 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-70367 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-70368 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-70368 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-70368 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for stunnel fixes the following issues:

  * CVE-2026-70367: incomplete IP address filtering in SOCKS proxy mode can
    allow localhost restriction bypasses (bsc#1274207).
  * CVE-2026-70368: oversized log messages in logging routines can cause stack
    out-of-bounds reads (bsc#1274206).

## 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 for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1901

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1901

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * stunnel-5.74-160000.3.1
    * stunnel-debugsource-5.74-160000.3.1
    * stunnel-debuginfo-5.74-160000.3.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * stunnel-doc-5.74-160000.3.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * stunnel-5.74-160000.3.1
    * stunnel-debugsource-5.74-160000.3.1
    * stunnel-debuginfo-5.74-160000.3.1
  * SUSE Linux Enterprise Server 16.0 (noarch)
    * stunnel-doc-5.74-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-70367.html
  * https://www.suse.com/security/cve/CVE-2026-70368.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1274206
  * https://bugzilla.suse.com/show_bug.cgi?id=1274207

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