Multiple race conditions in the ext4 filesystem implementation in the Linux kernel before 4.5 allow local users to cause a denial of service (disk corruption) by writing to a page that is associated with a different user's file after unsynchronized hole punching and page-fault handling.
http://www.openwall.com/lists/oss-security/2016/04/01/4
http://www.securityfocus.com/bid/85798
http://www.securitytracker.com/id/1035455
http://www.ubuntu.com/usn/USN-3005-1
http://www.ubuntu.com/usn/USN-3006-1
http://www.ubuntu.com/usn/USN-3007-1
https://access.redhat.com/errata/RHSA-2017:1842
https://access.redhat.com/errata/RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:2669
https://bugzilla.redhat.com/show_bug.cgi?id=1323577
https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933b
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
Source: MITRE
Published: 2016-05-02
Updated: 2020-10-02
Type: CWE-362
Base Score: 1.9
Vector: AV:L/AC:M/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 3.4
Severity: LOW
Base Score: 5.1
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.4
Severity: MEDIUM