SUSE-SU-2026:3417-1: important: Security update for apptainer

[SLE-UPDATES]

# Security update for apptainer

Announcement ID: SUSE-SU-2026:3417-1  
Release Date: 2026-07-30T07:06:34Z  
Rating: important  
References:

  * bsc#1266656
  * bsc#1272115

  
Cross-References:

  * CVE-2026-39821
  * CVE-2026-56852

  
CVSS scores:

  * CVE-2026-39821 ( SUSE ):  9.1
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-39821 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-56852 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56852 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56852 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * HPC Module 15-SP7
  * openSUSE Leap 15.6
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * 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 SP7
  * SUSE Package Hub 15 15-SP7

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for apptainer fixes the following issues:

  * CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only
    Punycode-encoded labels allows for validation bypass and privilege
    escalation (bsc#1266656).
  * CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on
    truncated/invalid UTF-8 input (bsc#1272115).

Changes for apptainer:

  * Update apptainer to version 1.5.3:

  * If the ptrace() system call does not work while building an image as an
    unprivileged user, skip using PRoot to preserve file ownership and print an
    INFO message.

  * Bind getopt from the host when using fakeroot command mode, to make the
    fakeroot command work with base containers which no longer contain getopt by
    default.
  * Extended the mksquashfs segmentation fault workaround for cases where
    mksquashfs uses many processor cores.

## 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 Package Hub 15 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-3417=1

  * HPC Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-HPC-15-SP7-2026-3417=1

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-3417=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3417=1

## Package List:

  * SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
    * apptainer-sle15_6-1.5.3-150600.4.34.2
  * SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 x86_64)
    * apptainer-1.5.3-150600.4.34.2
    * apptainer-debuginfo-1.5.3-150600.4.34.2
  * openSUSE Leap 15.6 (noarch)
    * apptainer-sle16-1.5.3-150600.4.34.2
    * apptainer-leap-1.5.3-150600.4.34.2
    * apptainer-sle15_7-1.5.3-150600.4.34.2
    * apptainer-sle15_6-1.5.3-150600.4.34.2
  * openSUSE Leap 15.6 (aarch64 x86_64)
    * apptainer-1.5.3-150600.4.34.2
    * apptainer-suid-1.5.3-150600.4.34.2
    * apptainer-debuginfo-1.5.3-150600.4.34.2
    * apptainer-suid-debuginfo-1.5.3-150600.4.34.2
  * SUSE Package Hub 15 15-SP7 (aarch64 x86_64)
    * apptainer-1.5.3-150600.4.34.2
    * apptainer-suid-1.5.3-150600.4.34.2
  * HPC Module 15-SP7 (noarch)
    * apptainer-sle15_7-1.5.3-150600.4.34.2
  * HPC Module 15-SP7 (aarch64 x86_64)
    * apptainer-1.5.3-150600.4.34.2
    * apptainer-debuginfo-1.5.3-150600.4.34.2

## References:

  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-56852.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1266656
  * https://bugzilla.suse.com/show_bug.cgi?id=1272115

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