CVE-2021-4037

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.

CVSS 3.1

4.4CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-25)

CWE

CWE-284

Published

2022-08-24

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://access.redhat.com/errata/RHSA-2022:1975
• https://access.redhat.com/errata/RHSA-2022:1988
• https://access.redhat.com/errata/RHSA-2022:4829
• https://access.redhat.com/errata/RHSA-2022:4835
• https://access.redhat.com/security/cve/CVE-2021-4037

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