smb: client: fix potential UAF in smb2_close_cached_fid()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_close_cached_fid() find_or_create_cached_dir() could grab a new reference after kref_put() had seen the refcount drop to zero but before cfid_list_lock is acquired in smb2_close_cached_fid(), leading to use-after-free. Switch to kref_put_lock() so cfid_release() is called with cfid_list_lock held, closing that gap.
CVE-2025-40328
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-2025-40328
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": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
"lessThan": "cb52d9c86d70298de0ab7c7953653898cbc0efd6",
"versionType": "git"
},
{
"status": "affected",
"version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
"lessThan": "065bd62412271a2d734810dd50336cae88c54427",
"versionType": "git"
},
{
"status": "affected",
"version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
"lessThan": "bdb596ceb4b7c3f28786a33840263728217fbcf5",
"versionType": "git"
},
{
"status": "affected",
"version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
"lessThan": "734e99623c5b65bf2c03e35978a0b980ebc3c2f8",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/cached_dir.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/cached_dir.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-40328
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30716 · Revision 1
- Added to Heist Feed
- Publisher date