CVE-2018-18397 - CVE House
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Status published Medium CVE-2018-18397

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles...

Vulnerability Description

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.

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

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

linux kernel, openshift container platform, virtualization host, enterprise linux desktop, enterprise linux server, enterprise linux server aus, enterprise linux server eus, enterprise linux server tus, enterprise linux workstation, ubuntu linux
Vulnerable Versions:
0, 3.11, 4.0, 7.0, 7.4, 7.6, 7.5, 14.04, 16.04, 18.04, 18.10

Timeline

Official Publish: December 12th, 2018
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

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

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.