Is CVE-2021-33910 actively exploited?

CVE-2021-33910 has no public evidence of in-the-wild exploitation as of 2025-06-09.

What is the CVSS score for CVE-2021-33910?

CVE-2021-33910 has a CVSS score of 5.5 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-33910?

Patch guidance is available from systemd project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-33910.

CVE-2021-33910 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-33910?

9 products: systemd project systemd, systemd project systemd, systemd project systemd, systemd project systemd, fedoraproject fedora, and 4 more.

Description

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-770 CWE-770

Metadata

Primary Vendor: SYSTEMD_PROJECT
Published: 7/20/2021
Last Modified: 6/9/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

systemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdfedoraproject : fedorafedoraproject : fedoradebian : debian_linuxnetapp : hci_management_nodenetapp : solidfire

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-33910. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-33910

View on NIST NVD

CVE-2021-33910 vulnerability