CVE-2025-39932
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work) In smbd_destroy() we may destroy the memory so we better wait until post_send_credits_work is no longer pending and will never be started again. I actually just hit the case using rxe: WARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe] ... [ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs] [ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30 [ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs] [ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60 [ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs] [ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs] [ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs] [ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10 [ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0 [ 5305.687889] [ T138] process_one_work+0x629/0xf80 [ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30 [ 5305.687933] [ T138] worker_thread+0x87f/0x1570 ... It means rxe_post_recv was called after rdma_destroy_qp(). This happened because put_receive_buffer() was triggered by ib_drain_qp() and called: queue_work(info->workqueue, &info->post_send_credits_work);
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-04 08:15:45.953000
Last modified
2026-10-30 13:18:11.463000
View original CVE JSON
{
"id": "CVE-2025-39932",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-04T08:15:45.953",
"lastModified": "2026-10-30T13:18:11.463",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)\n\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\n\nI actually just hit the case using rxe:\n\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info->workqueue, &info->post_send_credits_work);"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nsmb: cliente: permitir que smbd_destroy() llame a disable_work_sync(&info->post_send_credits_work)\n\nEn smbd_destroy() podemos destruir la memoria, así que es mejor esperar hasta que post_send_credits_work ya no esté pendiente y nunca se inicie de nuevo.\n\nDe hecho, acabo de encontrar el caso usando rxe:\n\nADVERTENCIA: CPU: 0 PID: 138 en drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nSignifica que rxe_post_recv fue llamado después de rdma_destroy_qp().\nEsto ocurrió porque put_receive_buffer() fue activado por ib_drain_qp() y llamó a:\nqueue_work(info->workqueue, &info->post_send_credits_work);"
}
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"source": "[email protected]",
"type": "Primary",
"description": [
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