SUSE-SU-2026:2723-1: moderate: Security update for python311

# Security update for python311

Announcement ID: SUSE-SU-2026:2723-1  
Release Date: 2026-07-01T18:09:22Z  
Rating: moderate  
References:

  * bsc#1258364
  * bsc#1261970

  
Cross-References:

  * CVE-2026-3446

  
CVSS scores:

  * CVE-2026-3446 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-3446 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-3446 ( NVD ):  6.0
    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

  
Affected Products:

  * openSUSE Leap 15.4
  * Public Cloud Module 15-SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Manager Proxy 4.3
  * SUSE Manager Retail Branch Server 4.3
  * SUSE Manager Server 4.3

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

## Description:

This update for python311 fixes the following issues:

Security issues fixed:

  * CVE-2026-3446: base64 decoding stops at first padded quad by default and
    ignores other information that could be processed (bsc#1261970).

Other updates and bugfixes:

  * Rewrite structure of Python interpreter packages. `python3*` symbols should
    be now provided by real `python3` packages and its subpackages instead of
    the virtual provides (bsc#1258364).

## 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:

  * Public Cloud Module 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP4-2026-2723=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-2723=1

## Package List:

  * openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
    * python311-core-debugsource-3.11.15-150400.9.88.1
    * python311-testsuite-3.11.15-150400.9.88.1
    * python311-curses-debuginfo-3.11.15-150400.9.88.1
    * python311-doc-devhelp-3.11.15-150400.9.88.1
    * python311-dbm-3.11.15-150400.9.88.1
    * python311-testsuite-debuginfo-3.11.15-150400.9.88.1
    * python311-idle-3.11.15-150400.9.88.1
    * python311-debugsource-3.11.15-150400.9.88.1
    * python311-tools-3.11.15-150400.9.88.1
    * libpython3_11-1_0-3.11.15-150400.9.88.1
    * python311-base-3.11.15-150400.9.88.1
    * python311-doc-3.11.15-150400.9.88.1
    * python311-curses-3.11.15-150400.9.88.1
    * python311-devel-3.11.15-150400.9.88.1
    * libpython3_11-1_0-debuginfo-3.11.15-150400.9.88.1
    * python311-3.11.15-150400.9.88.1
    * python311-tk-debuginfo-3.11.15-150400.9.88.1
    * python311-tk-3.11.15-150400.9.88.1
    * python311-dbm-debuginfo-3.11.15-150400.9.88.1
    * python311-debuginfo-3.11.15-150400.9.88.1
    * python311-base-debuginfo-3.11.15-150400.9.88.1
  * openSUSE Leap 15.4 (x86_64)
    * libpython3_11-1_0-32bit-debuginfo-3.11.15-150400.9.88.1
    * python311-32bit-debuginfo-3.11.15-150400.9.88.1
    * python311-base-32bit-debuginfo-3.11.15-150400.9.88.1
    * python311-32bit-3.11.15-150400.9.88.1
    * libpython3_11-1_0-32bit-3.11.15-150400.9.88.1
    * python311-base-32bit-3.11.15-150400.9.88.1
  * openSUSE Leap 15.4 (aarch64_ilp32)
    * libpython3_11-1_0-64bit-debuginfo-3.11.15-150400.9.88.1
    * python311-base-64bit-debuginfo-3.11.15-150400.9.88.1
    * python311-64bit-3.11.15-150400.9.88.1
    * libpython3_11-1_0-64bit-3.11.15-150400.9.88.1
    * python311-64bit-debuginfo-3.11.15-150400.9.88.1
    * python311-base-64bit-3.11.15-150400.9.88.1
  * Public Cloud Module 15-SP4 (aarch64 ppc64le s390x x86_64)
    * python311-base-3.11.15-150400.9.88.1
    * python311-3.11.15-150400.9.88.1
    * libpython3_11-1_0-3.11.15-150400.9.88.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-3446.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1258364
  * https://bugzilla.suse.com/show_bug.cgi?id=1261970