CVE-2018-15686 - CVE House
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Status published High CVE-2018-15686

systemd: reexec state injection: fgets() on overlong lines leads to line splitting

Vulnerability Description

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Jann Horn

References

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Affected Vendor

Affected Software

systemd
Vulnerable Versions:
unspecified

Timeline

Official Publish: October 26th, 2018
Last Modified: June 9th, 2025
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.