ksmbd: preserve VFS inherited POSIX ACL mask
In the Linux kernel, the following vulnerability has been resolved: ksmbd: preserve VFS inherited POSIX ACL mask The VFS initializes a child's POSIX ACL from the parent's default ACL and the requested creation mode. Do not mutate the parent ACL or overwrite the child's VFS-computed access and default ACLs afterwards. This preserves restrictive ACL_MASK entries and prevents SMB object creation from widening effective permissions.
CVE-2026-93786
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-2026-93786
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": "f44158485826c076335d6860d35872271a83791d",
"lessThan": "4a19bb1c45667f5a5f6eff9cf6648e0f692d046f",
"versionType": "git"
},
{
"status": "affected",
"version": "f44158485826c076335d6860d35872271a83791d",
"lessThan": "591acf171644de590cda245fd8595b473a1beb70",
"versionType": "git"
},
{
"status": "affected",
"version": "f44158485826c076335d6860d35872271a83791d",
"lessThan": "0093909becbda22b62b39b654dbc607faed59cd0",
"versionType": "git"
},
{
"status": "affected",
"version": "f44158485826c076335d6860d35872271a83791d",
"lessThan": "e148e567a9252643baa125cb65d7ae9c2c6cf68a",
"versionType": "git"
}
],
"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": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"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-2026-93786
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #8265 · Revision 1
- Added to Heist Feed
- Publisher date