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.
Published: 2018-12-12
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Advisories
Source ID Title
EUVD EUVD EUVD-2018-10126 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.
Ubuntu USN Ubuntu USN USN-3901-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3901-2 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3903-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3903-2 Linux kernel (HWE) vulnerabilities
History

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Canonical Ubuntu Linux
Linux Linux Kernel
Redhat Enterprise Linux Enterprise Linux Desktop Enterprise Linux Server Enterprise Linux Server Aus Enterprise Linux Server Eus Enterprise Linux Server Tus Enterprise Linux Workstation Openshift Container Platform Rhel Eus Virtualization Host
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T11:08:21.825Z

Reserved: 2018-10-16T00:00:00.000Z

Link: CVE-2018-18397

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

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

Modified: 2024-11-21T03:55:52.280

Link: CVE-2018-18397

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-11-26T00:00:00Z

Links: CVE-2018-18397 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses