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.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2018-12-12T07:00:00

Updated: 2019-04-24T05:06:07

Reserved: 2018-10-16T00:00:00


Link: CVE-2018-18397

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2018-12-12T10:29:00.240

Modified: 2020-08-24T17:37:01.140


Link: CVE-2018-18397

JSON object: View

cve-icon Redhat Information

No data.

CWE