Link Following Affecting libnss_himmelblau2 package, versions <2.3.8+git0.dec3693-160000.1.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-SLES1600-LIBNSSHIMMELBLAU2-16049098
  • published14 Apr 2026
  • disclosed1 Apr 2026

Introduced: 1 Apr 2026

CVE-2026-31979  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 libnss_himmelblau2 to version 2.3.8+git0.dec3693-160000.1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libnss_himmelblau2 package and not the libnss_himmelblau2 package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Prior to 3.1.0 and 2.3.8, the himmelblaud-tasks daemon, running as root, writes Kerberos cache files under /tmp/krb5cc_<uid> without symlink protections. Since commit 87a51ee, PrivateTmp is explicitly removed from the tasks daemon's systemd hardening, exposing it to the host /tmp. A local user can exploit this via symlink attacks to chown or overwrite arbitrary files, achieving local privilege escalation. This vulnerability is fixed in 3.1.0 and 2.3.8.

CVSS Base Scores

version 3.1