fkie_cve-2025-38567
Vulnerability from fkie_nvd
Published
2025-08-19 17:15
Modified
2025-08-20 14:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: avoid ref leak in nfsd_open_local_fh()
If two calls to nfsd_open_local_fh() race and both successfully call
nfsd_file_acquire_local(), they will both get an extra reference to the
net to accompany the file reference stored in *pnf.
One of them will fail to store (using xchg()) the file reference in
*pnf and will drop that reference but WON'T drop the accompanying
reference to the net. This leak means that when the nfs server is shut
down it will hang in nfsd_shutdown_net() waiting for
&nn->nfsd_net_free_done.
This patch adds the missing nfsd_net_put().
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: avoid ref leak in nfsd_open_local_fh()\n\nIf two calls to nfsd_open_local_fh() race and both successfully call\nnfsd_file_acquire_local(), they will both get an extra reference to the\nnet to accompany the file reference stored in *pnf.\n\nOne of them will fail to store (using xchg()) the file reference in\n*pnf and will drop that reference but WON\u0027T drop the accompanying\nreference to the net. This leak means that when the nfs server is shut\ndown it will hang in nfsd_shutdown_net() waiting for\n\u0026nn-\u003enfsd_net_free_done.\n\nThis patch adds the missing nfsd_net_put()."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: evitar fuga de referencia en nfsd_open_local_fh(). Si se ejecutan dos llamadas a nfsd_open_local_fh() y ambas invocan correctamente nfsd_file_acquire_local(), ambas obtendr\u00e1n una referencia adicional a la red que acompa\u00f1a a la referencia del archivo almacenada en *pnf. Una de ellas no almacenar\u00e1 (mediante xchg()) la referencia del archivo en *pnf y la eliminar\u00e1, pero NO eliminar\u00e1 la referencia que la acompa\u00f1a a la red. Esta fuga significa que, al apagar el servidor NFS, se bloquear\u00e1 en nfsd_shutdown_net() esperando \u0026amp;nn-\u0026gt;nfsd_net_free_done. Este parche a\u00f1ade la funci\u00f3n nfsd_net_put() que faltaba."
}
],
"id": "CVE-2025-38567",
"lastModified": "2025-08-20T14:40:17.713",
"metrics": {},
"published": "2025-08-19T17:15:33.380",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c4bf8f26c51e51bbb840935659a7b3b65a802c07"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e5a73150776f18547ee685c9f6bfafe549714899"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fcb0a417fddb605530c4837e0996620f8ed38023"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…