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CVE-2018-15687

HighPublished

systemd: chown_one() can dereference symlinks

Published: Oct 26, 2018
Updated: Jun 9, 2025
Assigning CNA: canonical
Evidence observed: Oct 29, 2018

Primary CVSS

7.0/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

1.1%

Low · next 30 days

Percentile: 62.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239.

Sources

systemd - 'chown_one()' Dereference SymlinksExploit
Google Security Research · linux · Oct 29, 2018

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