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CVE-2021-3997

Published: 10 January 2022

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.

Notes

AuthorNote
amurray
This vulnerability does not appear to be exploitable for systemd versions before v242 (ie before commit e535840) and onwards hence this is not possible to be exploited on Ubuntu 18.04 LTS and earlier.
Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
bionic Ignored
(cannot be exploited)
focal
Released (245.4-4ubuntu3.15)
hirsute
Released (247.3-3ubuntu3.7)
impish
Released (248.3-1ubuntu8.2)
trusty Ignored
(cannot be exploited)
upstream Needs triage

xenial Ignored
(cannot be exploited)