The ext4_fill_super function in fs/ext4/super.c in the Linux kernel through 4.9.8 does not properly validate meta block groups, which allows physically proximate attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image.
http://seclists.org/fulldisclosure/2016/Nov/75
http://www.openwall.com/lists/oss-security/2017/02/05/3
http://www.securityfocus.com/bid/94354
https://access.redhat.com/errata/RHSA-2017:1297
https://access.redhat.com/errata/RHSA-2017:1298
https://access.redhat.com/errata/RHSA-2017:1308
https://bugzilla.redhat.com/show_bug.cgi?id=1395190
https://github.com/torvalds/linux/commit/3a4b77cd47bb837b8557595ec7425f281f2ca1fe
https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
Source: MITRE
Published: 2017-02-06
Updated: 2018-08-24
Type: CWE-125
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 4.3
Vector: CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 0.7
Severity: MEDIUM