ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling 1. 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. 2. 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.
CVE-2026-93811
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93811
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "cb69d4d6f709f87c94afa28ae64c501576692171",
"lessThan": "f46a70a082bdbfecbe074af8a719c26c4deb58c6",
"versionType": "git"
},
{
"status": "affected",
"version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
"lessThan": "86c2625fb9863139b359805fc6be1e31edbd3d65",
"versionType": "git"
},
{
"status": "affected",
"version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
"lessThan": "edc17db83085624a2b1bacf6a4521d7f15571737",
"versionType": "git"
},
{
"status": "affected",
"version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
"lessThan": "c3836f55e0dab96314774215e12d87f63fa919f2",
"versionType": "git"
},
{
"status": "affected",
"version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
"lessThan": "6e6329322ad733c5b23555c609353841560b26bc",
"versionType": "git"
},
{
"status": "affected",
"version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
"lessThan": "d708a36634bb7b6f94d0e76d587d2ec50b2b93b5",
"versionType": "git"
},
{
"status": "affected",
"version": "6e8f4abf584253cbaa596ea4ad13110cf61cd4c9",
"versionType": "git"
},
{
"status": "affected",
"version": "8e33102309bd6839b2e2e158f93a7b378cb4655d",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.62",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.18.18",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.19.2",
"lessThan": "5.20",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/server/vfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/server/vfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93811
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #8285 · Revision 1
- Added to Heist Feed
- Publisher date