{"id":"CVE-2026-93786","summary":"ksmbd: preserve VFS inherited POSIX ACL mask","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: preserve VFS inherited POSIX ACL mask\n\nThe VFS initializes a child's POSIX ACL from the parent's default ACL and\nthe requested creation mode. Do not mutate the parent ACL or overwrite the\nchild's VFS-computed access and default ACLs afterwards.\n\nThis preserves restrictive ACL_MASK entries and prevents SMB object creation\nfrom widening effective permissions.","modified":"2026-09-26T03:48:26.682565505Z","published":"2026-09-24T16:02:19.798Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93786.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93786.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93786"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f44158485826c076335d6860d35872271a83791d"},{"fixed":"591acf171644de590cda245fd8595b473a1beb70"},{"fixed":"0093909becbda22b62b39b654dbc607faed59cd0"},{"fixed":"e148e567a9252643baa125cb65d7ae9c2c6cf68a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93786.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93786.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}