CVE-2021-3997

Public Exploit

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory gentoo.org
Affected: n/a systemd
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2024639 patch third party advisory issue tracking
https://www.openwall.com/lists/oss-security/2022/01/10/2 mailing list third party advisory exploit
https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 third party advisory patch
https://access.redhat.com/security/cve/CVE-2021-3997 third party advisory issue tracking
https://security.gentoo.org/glsa/202305-15 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3997?
CVE-2021-3997 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3997?
To fix CVE-2021-3997, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3997 being actively exploited in the wild?
It is possible that CVE-2021-3997 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3997?
CVE-2021-3997 affects n/a systemd.
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