CVE-2021-40084

CRITICAL 9.8CVE-2021-40084 · Published 25/08/2021 · updated 17/06/2026

In short

CVE-2021-40084 is a CRITICAL (CVSS 9.8) vulnerability affecting opensysusers (artixlinux).
Chance of exploitation in the next 30 days (EPSS): 2.9%, higher than 87.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
opensysusers artixlinux	`≤ 0.6`	No fix yet

Description

opensysusers through 0.6 does not safely use eval on files in sysusers.d that may contain shell metacharacters. For example, it allows command execution via a crafted GECOS field whereas systemd-sysusers (a program with the same specification) does not do that.

References

bugs.debian.org/992058 · Exploit
artix-linux/opensysusers release · Release Notes

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