cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths
In the Linux kernel, the following vulnerability has been resolved: cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths In cifs_close_deferred_file(), cifs_close_all_deferred_files(), and cifs_close_deferred_file_under_dentry(), when a pending deferred close is cancelled via cancel_delayed_work(), the subsequent kmalloc_obj() to add the file to the local processing list may fail under memory pressure. The loop breaks immediately, but the cancelled work is no longer pending (it would have called _cifsFileInfo_put()), and the cfile is never added to file_head for processing. The cifsFileInfo reference and the open server handle both leak. Fix by saving the cfile that failed allocation in a local variable, breaking as before, and calling _cifsFileInfo_put() on it after releasing the lock. Any files later in the iteration are unaffected since their deferred work is still pending and will fire normally.
CVE-2026-68312
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-2026-68312
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": "e3fc065682ebbbd15b0ce0036800f4acbf765d46",
"lessThan": "c968b2417f6a15d35ff4b97d534af4a126cb510b",
"versionType": "git"
},
{
"status": "affected",
"version": "e3fc065682ebbbd15b0ce0036800f4acbf765d46",
"lessThan": "7af7ec3af091f55d01f0ebe0246d10e37f358311",
"versionType": "git"
},
{
"status": "affected",
"version": "e3fc065682ebbbd15b0ce0036800f4acbf765d46",
"lessThan": "6089f561e2c31a3ba52836c75c7d2ab50d2eea41",
"versionType": "git"
},
{
"status": "affected",
"version": "e3fc065682ebbbd15b0ce0036800f4acbf765d46",
"lessThan": "32390b3f06f26e366cfb27dbac4bc0196c321535",
"versionType": "git"
},
{
"status": "affected",
"version": "e3fc065682ebbbd15b0ce0036800f4acbf765d46",
"lessThan": "c2f2e83e3bbc5483730fd4ee903182761f1ae50f",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/misc.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": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/misc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68312
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46462 · Revision 1
- Added to Heist Feed
- Publisher date