Vulnerability in Systemd Project
CVE-2021-3997
A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.
EPSS: 0.016 (72.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Systemd_project Systemd
- Fedoraproject Fedora — versions 34, 35
- Redhat Enterprise_linux — versions 7.0, 8.0, 9.0
- N/a Systemd — versions Fixed in v251-rc1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Exploit, Mailing List, Third Party Advisory)
- secalert@redhat.com (Patch, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (vendor-advisory)
Frequently asked questions
- What is CVE-2021-3997?
- CVE-2021-3997 is a medium-severity vulnerability in Systemd Project, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2022-08-23.
- How severe is CVE-2021-3997?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-3997 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.