{"id":"CVE-2026-93811","revision":"a7cf992e80294ecea5a9ca3b76cab0f4","records":[{"revision":"a7cf992e80294ecea5a9ca3b76cab0f4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93811","aliases":[],"title":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer.","state":0,"publishedAt":"2026-09-24T16:02:47.745+00:00","modifiedAt":"2026-10-03T10:57:43.607+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/server/vfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cb69d4d6f709f87c94afa28ae64c501576692171\",\n                            \"lessThan\": \"f46a70a082bdbfecbe074af8a719c26c4deb58c6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f0541186e9ad1b62accc9519cc2b7a7240272a7\",\n                            \"lessThan\": \"86c2625fb9863139b359805fc6be1e31edbd3d65\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f0541186e9ad1b62accc9519cc2b7a7240272a7\",\n                            \"lessThan\": \"edc17db83085624a2b1bacf6a4521d7f15571737\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f0541186e9ad1b62accc9519cc2b7a7240272a7\",\n                            \"lessThan\": \"c3836f55e0dab96314774215e12d87f63fa919f2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f0541186e9ad1b62accc9519cc2b7a7240272a7\",\n                            \"lessThan\": \"6e6329322ad733c5b23555c609353841560b26bc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f0541186e9ad1b62accc9519cc2b7a7240272a7\",\n                            \"lessThan\": \"d708a36634bb7b6f94d0e76d587d2ec50b2b93b5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6e8f4abf584253cbaa596ea4ad13110cf61cd4c9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e33102309bd6839b2e2e158f93a7b378cb4655d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.15.62\",\n                            \"lessThan\": \"5.15.222\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.18.18\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.19.2\",\n                            \"lessThan\": \"5.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/server/vfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6","https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65","https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737","https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2","https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc","https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93811","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93811","identifiers":["CVE-2026-93811"]},"retained":false,"historicalAffected":[]}],"coverage":[]}