{"id":"CVE-2021-4037","title":"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 permis…","summary":"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 permis…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-284"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 5.11","debian_linux = 10.0","debian_linux = 11.0"],"patched":["linux_kernel 5.11"],"published":"2022-08-24","updated":"2026-10-14","sourceUpdated":"2026-10-14T11:16:54.370","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-4037","references":[{"url":"https://access.redhat.com/errata/RHSA-2022:1975","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2022:1988","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2022:4829","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2022:4835","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2021-4037","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2027239","label":"secalert@redhat.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103e","label":"secalert@redhat.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2021-4037","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2004810","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2027239","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5257","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-806742.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00337,"epssPercentile":0.26994,"ingestedAt":"2026-08-11T16:47:02.445Z","slug":"CVE-2021-4037","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `linux_kernel < 5.11`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.11`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}