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Vulnerability details: VCID-dvhg-mcz2-r3f5
Vulnerability ID VCID-dvhg-mcz2-r3f5
Aliases CVE-2021-3997
Summary Multiple vulnerabilities have been discovered in systemd, the worst of which could result in denial of service.
Status Published
Exploitability 0.5
Weighted Severity 5.0
Risk 2.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-674 Uncontrolled Recursion
System Score Found at
cvssv3 5.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3997.json
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2021-3997
cvssv3.1 5.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3997.json
https://api.first.org/data/v1/epss?cve=CVE-2021-3997
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3997
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1003467 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1003467
2024639 https://bugzilla.redhat.com/show_bug.cgi?id=2024639
GLSA-202305-15 https://security.gentoo.org/glsa/202305-15
USN-5226-1 https://usn.ubuntu.com/5226-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3997.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.05745
EPSS Score 0.00021
Published At April 12, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:12:23.137120+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/202305-15 38.0.0