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Vulnerability record · CVE-2021-33622 · published 15 June 2021

CVE-2021-33622: Sylabs singularity vulnerability

Sylabs · Singularity

Sylabs Singularity 3.5.x and 3.6.x, and SingularityPRO before 3.5-8, has an Incorrect Check of a Function's Return Value.

9.8 CVSS 3.1 Critical EPSS 1.3% · top 30.9% CWE-754 · CWE-754
9.8CVSS 3.1 base score, v2 6.8
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Sylabs Singularity 3.5.x and 3.6.x, and SingularityPRO before 3.5-8, has an Incorrect Check of a Function's Return Value.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://medium.com/sylabs Third Party Advisory
https://support.sylabs.io/support/solutions/articles/42000087130-3-5-8-security-release-cve-2021-33622- Vendor Advisory
https://medium.com/sylabs Third Party Advisory
https://support.sylabs.io/support/solutions/articles/42000087130-3-5-8-security-release-cve-2021-33622- Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-33027Sylabs singularity vulnerabilitySylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.EPSS 1.3%9.3CVE-2020-15229Sylabs singularity path traversal vulnerabilitySingularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure handling of path traversal and …EPSS 2.0%8.8CVE-2020-25040Sylabs singularity exposure of resource to wrong sphere vulnerabilitySylabs Singularity through 3.6.2 has Insecure Permissions on temporary directories used in explicit and implicit container build operations, a differ…EPSS 2.0%8.8CVE-2019-11328Sylabs singularity incorrect permission assignment vulnerabilityAn issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host system (e.g. ssh) could exploit thi…EPSS 2.1%8.1CVE-2020-25039Sylabs singularity exposure of resource to wrong sphere vulnerabilitySylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user namespace container execution.EPSS 2.0%7.8CVE-2023-30549Lfprojects apptainer use after free vulnerabilityApptainer is an open source container platform for Linux. There is an ext4 use-after-free flaw that is exploitable through versions of Apptainer < 1.…EPSS 0.37%7.8CVE-2018-19295Sylabs singularity improper input validation vulnerabilitySylabs Singularity 2.4 to 2.6 allows local users to conduct Improper Input Validation attacks.EPSS 0.47%7.5CVE-2020-13847Sylabs singularity vulnerabilitySylabs Singularity 3.0 through 3.5 lacks support for an Integrity Check. Singularity's sign and verify commands do not sign metadata found in the glo…EPSS 0.63%

Source: NIST National Vulnerability Database (record CVE-2021-33622), CISA KEV, FIRST EPSS (scores of 2026-10-19). This page is refreshed as NVD updates the record.