What’s Vulnerable › Vulnerabilities

CVE-2017-18188

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-14 · updated 2026-06-17
• Weakness: CWE-59

Description

OpenRC opentmpfiles through 0.1.3, when the fs.protected_hardlinks sysctl is turned off, allows local users to obtain ownership of arbitrary files by creating a hard link inside a directory on which "chown -R" will be run.

Affected products

• Openr Opentmpfiles: through 0.1.3

References

• https://github.com/OpenRC/opentmpfiles/issues/3
• https://github.com/OpenRC/opentmpfiles/issues/3

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