{"id":"CVE-2026-64138","summary":"ksmbd: validate SID in parent security descriptor during ACL inheritance","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate SID in parent security descriptor during ACL inheritance\n\nIntroduce smb_validate_ntsd_sid() helper to safely validate Owner SID\nand Group SID inside the NT Security Descriptor (smb_ntsd) retrieved\nfrom the parent directory.","modified":"2026-07-22T03:31:45.714157518Z","published":"2026-07-19T15:40:31.760Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64138.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/18d8db24b0a5b7be4829238dd4022236df02d421"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c9d0646a9959752f11ca1080dc1ff26bd1756cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/69f030cf95488ae1186c72ac8c66fd279664ea7f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f0e5c9c663badc9982e6941322eef1cb17de0f11"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64138.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64138"},{"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":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"},{"fixed":"f0e5c9c663badc9982e6941322eef1cb17de0f11"},{"fixed":"18d8db24b0a5b7be4829238dd4022236df02d421"},{"fixed":"1c9d0646a9959752f11ca1080dc1ff26bd1756cb"},{"fixed":"69f030cf95488ae1186c72ac8c66fd279664ea7f"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64138.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64138.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}