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.

• CWE-284

• 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-2021-4037Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2027239Issue Tracking, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103eMailing List, Patch, Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848Mailing List, Patch, Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2021-4037Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2004810Issue Tracking, Permissions Required, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2027239Issue Tracking, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103eMailing List, Patch, Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848Mailing List, Patch, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing List, Third Party Advisory
• https://www.debian.org/security/2022/dsa-5257Third Party Advisory

Published

Aug 24, 2022

Last Modified

Aug 10, 2026

Status

Modified

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