CVE-2025-37960
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
memblock: Accept allocated memory before use in memblock_double_array()
When increasing the array size in memblock_double_array() and the slab is not yet available, a call to memblock_find_in_range() is used to reserve/allocate memory. However, the range returned may not have been accepted, which can result in a crash when booting an SNP guest:
Mitigate this by calling accept_memory() on the memory range returned before the slab is available.
Prior to v6.12, the accept_memory() interface used a 'start' and 'end' parameter instead of 'start' and 'size', therefore the accept_memory() call must be adjusted to specify 'start + size' for 'end' when applying to kernels prior to v6.12.
Detalles técnicos trazas, registros y código del informe original
RIP: 0010:memcpy_orig+0x68/0x130 Code: ... RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006 RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000 RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00 RBP: 0000000000002000 R08: 0000000000000000 R09: 0000000000002000 R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78 R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00 memblock_double_array+0xff/0x310 memblock_add_range+0x1fb/0x2f0 memblock_reserve+0x4f/0xa0 memblock_alloc_range_nid+0xac/0x130 memblock_alloc_internal+0x53/0xc0 memblock_alloc_try_nid+0x3d/0xa0 swiotlb_init_remap+0x149/0x2f0 mem_init+0xb/0xb0 mm_core_init+0x8f/0x350 start_kernel+0x17e/0x5d0 x86_64_start_reservations+0x14/0x30 x86_64_start_kernel+0x92/0xa0 secondary_startup_64_no_verify+0x194/0x19b
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: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- 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\nmemblock: Accept allocated memory before use in memblock_double_array()\n\nWhen increasing the array size in memblock_double_array() and the slab\nis not yet available, a call to memblock_find_in_range() is used to\nreserve/allocate memory. However, the range returned may not have been\naccepted, which can result in a crash when booting an SNP guest:\n\n RIP: 0010:memcpy_orig+0x68/0x130\n Code: ...\n RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006\n RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000\n RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00\n RBP: 0000000000002000 R08: 0000000000000000 R09: 0000000000002000\n R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78\n R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00\n memblock_double_array+0xff/0x310\n memblock_add_range+0x1fb/0x2f0\n memblock_reserve+0x4f/0xa0\n memblock_alloc_range_nid+0xac/0x130\n memblock_alloc_internal+0x53/0xc0\n memblock_alloc_try_nid+0x3d/0xa0\n swiotlb_init_remap+0x149/0x2f0\n mem_init+0xb/0xb0\n mm_core_init+0x8f/0x350\n start_kernel+0x17e/0x5d0\n x86_64_start_reservations+0x14/0x30\n x86_64_start_kernel+0x92/0xa0\n secondary_startup_64_no_verify+0x194/0x19b\n\nMitigate this by calling accept_memory() on the memory range returned\nbefore the slab is available.\n\nPrior to v6.12, the accept_memory() interface used a 'start' and 'end'\nparameter instead of 'start' and 'size', therefore the accept_memory()\ncall must be adjusted to specify 'start + size' for 'end' when applying\nto kernels prior to v6.12."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: memblock: aceptar memoria asignada antes de su uso en memblock_double_array(). Al aumentar el tamaño de la matriz en memblock_double_array() y la losa aún no está disponible, se utiliza una llamada a memblock_find_in_range() para reservar/asignar memoria. Sin embargo, es posible que no se haya aceptado el rango devuelto, lo que puede provocar un bloqueo al iniciar un invitado SNP: RIP: 0010:memcpy_orig+0x68/0x130 Código: ... RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006 RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000 RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00 RBP: 0000000000002000 R08: 000000000000000 R09: 0000000000002000 R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78 R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00 memblock_double_array+0xff/0x310 memblock_add_range+0x1fb/0x2f0 memblock_reserve+0x4f/0xa0 memblock_alloc_range_nid+0xac/0x130 memblock_alloc_internal+0x53/0xc0 memblock_alloc_try_nid+0x3d/0xa0 swiotlb_init_remap+0x149/0x2f0 mem_init+0xb/0xb0 mm_core_init+0x8f/0x350 start_kernel+0x17e/0x5d0 x86_64_start_reservations+0x14/0x30 x86_64_start_kernel+0x92/0xa0 secondary_startup_64_no_verify+0x194/0x19b Para mitigar este problema, llame a accept_memory() en el rango de memoria devuelto antes de que el slab esté disponible. Antes de la versión 6.12, la interfaz accept_memory() utilizaba los parámetros \"start\" y \"end\" en lugar de \"start\" y \"size\". Por lo tanto, la llamada a accept_memory() debe ajustarse para especificar \"start + size\" en lugar de \"end\" al aplicarlo a kernels anteriores a la versión 6.12."
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"lastModified": "2026-06-17T09:15:46.793",
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