CVE-2025-39932
Estado: ModificadaMedia (5.5)—
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:
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);
Detalles técnicos trazas, registros y código del informe original
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 ...
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.29%
- Percentil entre todas las CVEs puntuadas: 20
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
JSON original (NVD)
Mostrar
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"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);"
}
],
"lastModified": "2026-07-30T06:23:58.367",
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