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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639 Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639 Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · systemd_project, fedoraproject, redhatNVD modified 2026-10-14 10:17
Affected (CPE criteria) 6
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
References 11
- https://access.redhat.com/security/cve/CVE-2021-3997 Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639 Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202305-15
- https://www.openwall.com/lists/oss-security/2022/01/10/2 Exploit, Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-3997 Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024639 Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202305-15
- https://www.openwall.com/lists/oss-security/2022/01/10/2 Exploit, Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html