SUSE-SU-2026:4617-1: moderate: Security update for stunnel

[SLE-SECURITY-UPDATES]

# Security update for stunnel

Announcement ID: SUSE-SU-2026:4617-1  
Release Date: 2026-10-12T07:21:52Z  
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:

  * openSUSE Leap 15.6
  * Server Applications Module 15-SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
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:

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-4617

  * Server Applications Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2026-4617

## Package List:

  * openSUSE Leap 15.6 (aarch64 i586 ppc64le s390x x86_64)
    * stunnel-debugsource-5.70-150600.3.6.1
    * stunnel-debuginfo-5.70-150600.3.6.1
    * stunnel-5.70-150600.3.6.1
  * openSUSE Leap 15.6 (noarch)
    * stunnel-doc-5.70-150600.3.6.1
  * Server Applications Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * stunnel-debugsource-5.70-150600.3.6.1
    * stunnel-debuginfo-5.70-150600.3.6.1
    * stunnel-5.70-150600.3.6.1

## 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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