GHSA-47CF-52HV-JJQ9
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
-
When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data which only freed n.data, skipping kfree(acl.sd_buf) and leaking the buffer. Zero-initialize struct xattr_ntacl acl, reorder error labels to out_free to release acl.sd_buf on all error paths.
-
if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code returned success without freeing sd_buf and left stale *pntsd. Set rc = -EINVAL before jumping to out_free to return error code and free buffer.
{
"affected": [],
"aliases": [
"CVE-2026-93811"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:14Z",
"severity": null
},
"details": "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 \u003c 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.",
"id": "GHSA-47cf-52hv-jjq9",
"modified": "2026-09-24T18:31:30Z",
"published": "2026-09-24T18:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93811"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5"
}
],
"schema_version": "1.4.0",
"severity": []
}
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