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.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
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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. |
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USN-3901-1 | Linux kernel vulnerabilities |
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USN-3901-2 | Linux kernel (HWE) vulnerabilities |
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USN-3903-1 | Linux kernel vulnerabilities |
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USN-3903-2 | Linux kernel (HWE) vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.

Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T11:08:21.825Z
Reserved: 2018-10-16T00:00:00
Link: CVE-2018-18397

No data.

Status : Modified
Published: 2018-12-12T10:29:00.240
Modified: 2024-11-21T03:55:52.280
Link: CVE-2018-18397


No data.