CVE-2021-4037
linux - security update
7.8
HIGH
CVSS 3.1
EPSS 0.05%
Description
A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.
How to fix CVE-2021-4037
To remediate CVE-2021-4037, upgrade the affected package to a fixed version below.
- —upgrade to 5.10.149-1 or later
- —upgrade to 5.10.149-1 or later
- —upgrade to 5.10.149-2~deb10u1 or later
Is CVE-2021-4037 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 5.10.149-1
- from 0, < 5.10.149-1
- from 0, < 5.10.149-2~deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |