CVE-2018-18397

CVE Details

Release Date:

2018-12-12

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.

See more information about CVE-2018-18397 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4528	2019-01-31
Oracle Linux version 7 (kernel)	ELSA-2019-0163	2019-01-29
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4528	2019-01-31
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4541	2019-02-12
Oracle VM version 3.4 (kernel-uek)	OVMSA-2019-0002	2019-02-04

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team