SUSE-SU-2025:21168-1: important: Security update for python-cbor2

[SLE-SECURITY-UPDATES]

# Security update for python-cbor2

Announcement ID: SUSE-SU-2025:21168-1  
Release Date: 2025-12-02T13:51:41Z  
Rating: important  
References:

  * bsc#1220096
  * bsc#1253746

  
Cross-References:

  * CVE-2024-26134
  * CVE-2025-64076

  
CVSS scores:

  * CVE-2024-26134 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2024-26134 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-64076 ( SUSE ):  5.2
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:H/SC:L/SI:N/SA:N
  * CVE-2025-64076 ( SUSE ):  7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:H
  * CVE-2025-64076 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
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 python-cbor2 fixes the following issues:

  * CVE-2025-64076: Fixed bug in decode_definite_long_string() that causes
    incorrect chunk length calculation (bsc#1253746).

Already fixed in release 5.6.3:

  * CVE-2024-26134: Fixed potential crash when hashing a CBORTag (bsc#1220096).

## 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 16.0  
    zypper in -t patch SUSE-SLES-16.0-91=1

  * SUSE Linux Enterprise Server for SAP Applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-91=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * python-cbor2-debugsource-5.6.5-160000.3.1
    * python313-cbor2-debuginfo-5.6.5-160000.3.1
    * python313-cbor2-5.6.5-160000.3.1
  * SUSE Linux Enterprise Server for SAP Applications 16.0 (ppc64le x86_64)
    * python-cbor2-debugsource-5.6.5-160000.3.1
    * python313-cbor2-debuginfo-5.6.5-160000.3.1
    * python313-cbor2-5.6.5-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2024-26134.html
  * https://www.suse.com/security/cve/CVE-2025-64076.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1220096
  * https://bugzilla.suse.com/show_bug.cgi?id=1253746

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