CVE-2019-19767

medium

Description

The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka CID-4ea99936a163.

References

https://bugzilla.kernel.org/show_bug.cgi?id=205609

https://bugzilla.kernel.org/show_bug.cgi?id=205707

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a

https://github.com/torvalds/linux/commit/4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a

https://security.netapp.com/advisory/ntap-20200103-0001/

Details

Source: MITRE

Published: 2019-12-12

Updated: 2020-01-03

Type: CWE-416

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM