SUSE-SU-2026:0252-1: important: Security update for python-pyasn1

[SLE-SECURITY-UPDATES]

# Security update for python-pyasn1

Announcement ID: SUSE-SU-2026:0252-1  
Release Date: 2026-01-22T16:06:59Z  
Rating: important  
References:

  * bsc#1256902

  
Cross-References:

  * CVE-2026-23490

  
CVSS scores:

  * CVE-2026-23490 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23490 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * openSUSE Leap 15.4
  * openSUSE Leap 15.6
  * Public Cloud Module 15-SP4
  * Python 3 Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Manager Proxy 4.3
  * SUSE Manager Retail Branch Server 4.3
  * SUSE Manager Server 4.3

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for python-pyasn1 fixes the following issues:

  * CVE-2026-23490: Fixed Denial-of-Service issue that may lead to memory
    exhaustion from malformed RELATIVE-OID with excessive continuation octets
    (bsc#1256902)

## 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 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-252=1

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-252=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-252=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-252=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-252=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-252=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-252=1

  * openSUSE Leap 15.6  
    zypper in -t patch openSUSE-SLE-15.6-2026-252=1

  * Public Cloud Module 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP4-2026-252=1

  * Python 3 Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Python3-15-SP7-2026-252=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-252=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-252=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-252=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-252=1

## Package List:

  * SUSE Linux Enterprise Server 15 SP4 LTSS (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * openSUSE Leap 15.4 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * openSUSE Leap 15.6 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * Public Cloud Module 15-SP4 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * Python 3 Module 15-SP7 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (noarch)
    * python311-pyasn1-0.5.0-150400.12.10.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-23490.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1256902

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