CVE-2023-52757
Estado: AnalizadaAlta (7.8)—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: client: corrige un posible punto muerto al liberar mids. Todos los llamadores de release_mid() parecen tener una referencia de @mid, por lo que no hay necesidad de llamar a kref_put(&mid->refcount, __release_mid ) en @servidor->mid_lock spinlock. Si no lo hacen, de todos modos se habría producido un error de use after free.
Leer descripción completaMostrar menos
Al deshacerse de dicho bloqueo de giro, también se soluciona un posible punto muerto como se muestra a continuación CPU 0 CPU 1 -------------------------------- ---------------------------------- cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&servidor->mid_lock) ; spin_lock(&cifs_tcp_ses_lock) spin_lock(&servidor->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) *punto muerto*
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-416, CWE-667
Referencias
- https://git.kernel.org/stable/c/99f476e27aad5964ab13777d84fda67d1356dec1
- https://git.kernel.org/stable/c/9eb44db68c5b7f5aa22b8fc7de74a3e2e08d1f29
- https://git.kernel.org/stable/c/b9bb9607b1fc12fca51f5632da25b36975f599bf
- https://git.kernel.org/stable/c/c1a5962f1462b64fe7b69f20a4b6af8067bc2d26
- https://git.kernel.org/stable/c/ce49569079a9d4cad26c0f1d4653382fd9a5ca7a
- https://git.kernel.org/stable/c/e6322fd177c6885a21dd4609dc5e5c973d1a2eb7
- https://git.kernel.org/stable/c/9eb44db68c5b7f5aa22b8fc7de74a3e2e08d1f29
- https://git.kernel.org/stable/c/b9bb9607b1fc12fca51f5632da25b36975f599bf
- https://git.kernel.org/stable/c/c1a5962f1462b64fe7b69f20a4b6af8067bc2d26
- https://git.kernel.org/stable/c/e6322fd177c6885a21dd4609dc5e5c973d1a2eb7
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
JSON original (NVD)
Mostrar
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"attackComplexity": "LOW",
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"weaknesses": [
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"type": "Primary",
"source": "nvd@nist.gov",
"description": [
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"value": "CWE-416"
},
{
"lang": "en",
"value": "CWE-667"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential deadlock when releasing mids\n\nAll release_mid() callers seem to hold a reference of @mid so there is\nno need to call kref_put(&mid->refcount, __release_mid) under\n@server->mid_lock spinlock. If they don't, then an use-after-free bug\nwould have occurred anyways.\n\nBy getting rid of such spinlock also fixes a potential deadlock as\nshown below\n\nCPU 0 CPU 1\n------------------------------------------------------------------\ncifs_demultiplex_thread() cifs_debug_data_proc_show()\n release_mid()\n spin_lock(&server->mid_lock);\n spin_lock(&cifs_tcp_ses_lock)\n\t\t\t\t spin_lock(&server->mid_lock)\n __release_mid()\n smb2_find_smb_tcon()\n spin_lock(&cifs_tcp_ses_lock) *deadlock*"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: client: corrige un posible punto muerto al liberar mids. Todos los llamadores de release_mid() parecen tener una referencia de @mid, por lo que no hay necesidad de llamar a kref_put(&mid->refcount, __release_mid ) en @servidor->mid_lock spinlock. Si no lo hacen, de todos modos se habría producido un error de use after free. Al deshacerse de dicho bloqueo de giro, también se soluciona un posible punto muerto como se muestra a continuación CPU 0 CPU 1 -------------------------------- ---------------------------------- cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&servidor->mid_lock) ; spin_lock(&cifs_tcp_ses_lock) spin_lock(&servidor->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) *punto muerto*"
}
],
"lastModified": "2026-06-17T06:43:30.870",
"configurations": [
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