CVE-2022-49148
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
watch_queue: Free the page array when watch_queue is dismantled
Commit 7ea1a0124b6d ("watch_queue: Free the alloc bitmap when the watch_queue is torn down") took care of the bitmap, but not the page array.
Detalles técnicos trazas, registros y código del informe original
BUG: memory leak
unreferenced object 0xffff88810d9bc140 (size 32):
comm "syz-executor335", pid 3603, jiffies 4294946994 (age 12.840s)
hex dump (first 32 bytes):
40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
kmalloc_array include/linux/slab.h:621 [inline]
kcalloc include/linux/slab.h:652 [inline]
watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251
pipe_ioctl+0x82/0x140 fs/pipe.c:632
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]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: 0.26%
- Percentil entre todas las CVEs puntuadas: 16
- Fecha de la puntuación: 5/10/2026
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
- CWE-401
- CWE-401
Referencias
- https://git.kernel.org/stable/c/375cd2536494cfbcdda84ae8b3e35bf19d0250b9
- https://git.kernel.org/stable/c/3963a5d1ff75585bddf0c3a918566a6be09d7520
- https://git.kernel.org/stable/c/4913daecd04addb41bc96a9175a885e1c19862a8
- https://git.kernel.org/stable/c/7169f60110915c8b53bffd43741fa020a75eb87a
- https://git.kernel.org/stable/c/b490207017ba237d97b735b2aa66dc241ccd18f5
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatch_queue: Free the page array when watch_queue is dismantled\n\nCommit 7ea1a0124b6d (\"watch_queue: Free the alloc bitmap when the\nwatch_queue is torn down\") took care of the bitmap, but not the page\narray.\n\n BUG: memory leak\n unreferenced object 0xffff88810d9bc140 (size 32):\n comm \"syz-executor335\", pid 3603, jiffies 4294946994 (age 12.840s)\n hex dump (first 32 bytes):\n 40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@.............\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n kmalloc_array include/linux/slab.h:621 [inline]\n kcalloc include/linux/slab.h:652 [inline]\n watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251\n pipe_ioctl+0x82/0x140 fs/pipe.c:632\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:874 [inline]\n __se_sys_ioctl fs/ioctl.c:860 [inline]\n __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: watch_queue: liberar la matriz de páginas cuando se desmantela watch_queue. el commit 7ea1a0124b6d (\"watch_queue: liberar el mapa de bits de asignación cuando se desmantela watch_queue\") se hizo cargo del mapa de bits, pero no de la matriz de páginas. ERROR: pérdida de memoria objeto no referenciado 0xffff88810d9bc140 (tamaño 32): comm \"syz-executor335\", pid 3603, jiffies 4294946994 (edad 12.840s) volcado hexadecimal (primeros 32 bytes): 40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: kmalloc_array include/linux/slab.h:621 [en línea] kcalloc include/linux/slab.h:652 [en línea] watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251 pipe_ioctl+0x82/0x140 fs/pipe.c:632 vfs_ioctl fs/ioctl.c:51 [en línea] __do_sys_ioctl fs/ioctl.c:874 [en línea] __se_sys_ioctl fs/ioctl.c:860 [en línea] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [en línea]"
}
],
"lastModified": "2026-06-17T05:17:12.957",
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