SUSE SLES15 Security Update : apptainer (SUSE-SU-2026:3417-1)

high Nessus Plugin ID 331418

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3417-1 advisory.

- 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.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected apptainer, apptainer-sle15_6, apptainer-sle15_7 and / or apptainer-suid packages.

Plugin Details

Severity: High

ID: 331418

File Name: suse_SU-2026-3417-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/31/2026

Updated: 7/31/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.7

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-39821

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:apptainer-sle15_6, p-cpe:/a:novell:suse_linux:apptainer-sle15_7, p-cpe:/a:novell:suse_linux:apptainer-suid, p-cpe:/a:novell:suse_linux:apptainer

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-39821, CVE-2026-56852

SuSE: SUSE-SU-2026:3417-1

Detections

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