Vulnerability in Apptainer
CVE-2025-65105
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (12.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Apptainer — versions < 1.4.5
- Lfprojects Apptainer
Weakness classification (CWE)
References
- github.com/apptainer/apptainer/security/advisories/GHSA-j3rw-fx6g-q46j (Patch, Vendor Advisory)
- github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm (Not Applicable)
- github.com/sylabs/singularity/security/advisories/GHSA-wwrx-w7c9-rf87 (Not Applicable)
- github.com/apptainer/apptainer/pull/3226 (Issue Tracking)
- github.com/apptainer/apptainer/commit/4313b42717e18a4add7dd7503528bc15af905981 (Patch)
- github.com/apptainer/apptainer/commit/82f17900a0c31bc769bf9b4612d271c7068d8bf2 (Patch)
Frequently asked questions
- What is CVE-2025-65105?
- CVE-2025-65105 is a medium-severity vulnerability in Apptainer, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 4.5/10. Published 2025-12-02.
- How severe is CVE-2025-65105?
- Medium severity. CVSS v3 base score is 4.5 out of 10.