SUSE-SU-2026:21861-1: important: Security update for python-Pillow

[SLE-UPDATES]

# Security update for python-Pillow

Announcement ID: SUSE-SU-2026:21861-1  
Release Date: 2026-05-28T16:02:39Z  
Rating: important  
References:

  * bsc#1265153
  * bsc#1265154
  * bsc#1265359

  
Cross-References:

  * CVE-2026-42308
  * CVE-2026-42309
  * CVE-2026-42310

  
CVSS scores:

  * CVE-2026-42308 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-42308 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42308 ( NVD ):  5.1
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
  * CVE-2026-42308 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42309 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-42309 ( SUSE ):  8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  * CVE-2026-42309 ( NVD ):  5.1
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
  * CVE-2026-42309 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42310 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42310 ( NVD ):  5.1
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
  * CVE-2026-42310 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/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 three vulnerabilities can now be installed.

## Description:

This update for python-Pillow fixes the following issues

  * CVE-2026-42308: integer overflow in font processing can lead to denial of
    service (bsc#1265359).
  * CVE-2026-42309: heap buffer overflow when processing nested list coordinates
    (bsc#1265153).
  * CVE-2026-42310: infinite loop and resource exhaustion when processing
    specially crafted PDFs (bsc#1265154).

## 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-16.0-820=1

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-820=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * python-Pillow-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-tk-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-11.3.0-160000.5.1
    * python-Pillow-debugsource-11.3.0-160000.5.1
    * python313-Pillow-tk-11.3.0-160000.5.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * python-Pillow-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-tk-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-debuginfo-11.3.0-160000.5.1
    * python313-Pillow-11.3.0-160000.5.1
    * python-Pillow-debugsource-11.3.0-160000.5.1
    * python313-Pillow-tk-11.3.0-160000.5.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-42308.html
  * https://www.suse.com/security/cve/CVE-2026-42309.html
  * https://www.suse.com/security/cve/CVE-2026-42310.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1265153
  * https://bugzilla.suse.com/show_bug.cgi?id=1265154
  * https://bugzilla.suse.com/show_bug.cgi?id=1265359

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