fkie_cve-2025-38256
Vulnerability from fkie_nvd
Published
2025-07-09 11:15
Modified
2025-07-10 13:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
io_uring/rsrc: fix folio unpinning
syzbot complains about an unmapping failure:
[ 108.070381][ T14] kernel BUG at mm/gup.c:71!
[ 108.070502][ T14] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
[ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025
[ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work
[ 108.174205][ T14] Call trace:
[ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P)
[ 108.178138][ T14] unpin_user_page+0x80/0x10c
[ 108.180189][ T14] io_release_ubuf+0x84/0xf8
[ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c
[ 108.184345][ T14] io_rsrc_data_free+0x148/0x298
[ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0
[ 108.188991][ T14] io_ring_ctx_free+0x48/0x480
[ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8
[ 108.193207][ T14] process_one_work+0x7e8/0x155c
[ 108.195431][ T14] worker_thread+0x958/0xed8
[ 108.197561][ T14] kthread+0x5fc/0x75c
[ 108.199362][ T14] ret_from_fork+0x10/0x20
We can pin a tail page of a folio, but then io_uring will try to unpin
the head page of the folio. While it should be fine in terms of keeping
the page actually alive, mm folks say it's wrong and triggers a debug
warning. Use unpin_user_folio() instead of unpin_user_page*.
[axboe: adapt to current tree, massage commit message]
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: fix folio unpinning\n\nsyzbot complains about an unmapping failure:\n\n[ 108.070381][ T14] kernel BUG at mm/gup.c:71!\n[ 108.070502][ T14] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n[ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025\n[ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work\n[ 108.174205][ T14] Call trace:\n[ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P)\n[ 108.178138][ T14] unpin_user_page+0x80/0x10c\n[ 108.180189][ T14] io_release_ubuf+0x84/0xf8\n[ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c\n[ 108.184345][ T14] io_rsrc_data_free+0x148/0x298\n[ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0\n[ 108.188991][ T14] io_ring_ctx_free+0x48/0x480\n[ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8\n[ 108.193207][ T14] process_one_work+0x7e8/0x155c\n[ 108.195431][ T14] worker_thread+0x958/0xed8\n[ 108.197561][ T14] kthread+0x5fc/0x75c\n[ 108.199362][ T14] ret_from_fork+0x10/0x20\n\nWe can pin a tail page of a folio, but then io_uring will try to unpin\nthe head page of the folio. While it should be fine in terms of keeping\nthe page actually alive, mm folks say it\u0027s wrong and triggers a debug\nwarning. Use unpin_user_folio() instead of unpin_user_page*.\n\n[axboe: adapt to current tree, massage commit message]"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring/rsrc: se corrige la desanclaje de folio. syzbot se queja de un error de desasignaci\u00f3n: [ 108.070381][ T14] \u00a1ERROR del kernel en mm/gup.c:71! [ 108.070502][ T14] Error interno: Ups - ERROR: 00000000f2000800 [#1] SMP [ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025 [ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work [ 108.174205][ T14] Call trace: [ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P) [ 108.178138][ T14] unpin_user_page+0x80/0x10c [ 108.180189][ T14] io_release_ubuf+0x84/0xf8 [ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c [ 108.184345][ T14] io_rsrc_data_free+0x148/0x298 [ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0 [ 108.188991][ T14] io_ring_ctx_free+0x48/0x480 [ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8 [ 108.193207][ T14] process_one_work+0x7e8/0x155c [ 108.195431][ T14] worker_thread+0x958/0xed8 [ 108.197561][ T14] kthread+0x5fc/0x75c [ 108.199362][ T14] ret_from_fork+0x10/0x20 Podemos anclar la p\u00e1gina final de un folio, pero entonces io_uring intentar\u00e1 desanclar la p\u00e1gina principal. Si bien esto deber\u00eda funcionar correctamente para mantener la p\u00e1gina activa, los usuarios de mm indican que es incorrecto y genera una advertencia de depuraci\u00f3n. Use unpin_user_folio() en lugar de unpin_user_page*. [axboe: adaptar al \u00e1rbol actual, modificar el mensaje de confirmaci\u00f3n]"
}
],
"id": "CVE-2025-38256",
"lastModified": "2025-07-10T13:17:30.017",
"metrics": {},
"published": "2025-07-09T11:15:27.880",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/11e7b7369e655e6131387b174218d7fa9557b3da"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/53fd75f25b223878b5fff14932e3a22f42b54f77"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5afb4bf9fc62d828647647ec31745083637132e4"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
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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.
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