CVE-2025-65105: Lfprojects Apptainer

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Apptainer is an open source container platform. In Apptainer versions less than 1.4.5, a container can disable two of the forms of the little used --security option, in particular the forms --security=apparmor:<profile> and --security=selinux:<label> which otherwise put restrictions on operations that containers can do. The --security option has always been mentioned in Apptainer documentation as being a feature for the root user, although these forms do also work for unprivileged users on systems where the corresponding feature is enabled. Apparmor is enabled by default on Debian-based distributions and SElinux is enabled by default on RHEL-based distributions, but on SUSE it depends on the distribution version. This vulnerability is fixed in 1.4.5.

Affected products

• Lfprojects Apptainer: before 1.4.5 (fixed in 1.4.5)

Published 2025-12-02. Last modified 2026-06-17.