ghsa-v7vw-mgw4-jqvj
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
smb: Log an error when close_all_cached_dirs fails
Under low-memory conditions, close_all_cached_dirs() can't move the dentries to a separate list to dput() them once the locks are dropped. This will result in a "Dentry still in use" error, so add an error message that makes it clear this is what happened:
[ 495.281119] CIFS: VFS: \otters.example.com\share Out of memory while dropping dentries [ 495.281595] ------------[ cut here ]------------ [ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs] [ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0
Also, bail out of looping through all tcons as soon as a single allocation fails, since we're already in trouble, and kmalloc() attempts for subseqeuent tcons are likely to fail just like the first one did.
{
"affected": [],
"aliases": [
"CVE-2025-38321"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-10T09:15:26Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: Log an error when close_all_cached_dirs fails\n\nUnder low-memory conditions, close_all_cached_dirs() can\u0027t move the\ndentries to a separate list to dput() them once the locks are dropped.\nThis will result in a \"Dentry still in use\" error, so add an error\nmessage that makes it clear this is what happened:\n\n[ 495.281119] CIFS: VFS: \\\\otters.example.com\\share Out of memory while dropping dentries\n[ 495.281595] ------------[ cut here ]------------\n[ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs]\n[ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0\n\nAlso, bail out of looping through all tcons as soon as a single\nallocation fails, since we\u0027re already in trouble, and kmalloc() attempts\nfor subseqeuent tcons are likely to fail just like the first one did.",
"id": "GHSA-v7vw-mgw4-jqvj",
"modified": "2025-07-10T09:32:30Z",
"published": "2025-07-10T09:32:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38321"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/43f26094d6702e494e800532c3f1606e7a68eb30"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4479db143390bdcadc1561292aab579cdfa9f6c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a2182743a8b4969481f64aec4908ff162e8a206c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8ced2b9a23a1a2c1e0ed8d0d02512e51bdf38da"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.