CVE-2024-38630
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen. Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2024-06-21 11:15:11.810000
Last modified
2026-10-30 13:17:29.567000
View original CVE JSON
{
"id": "CVE-2024-38630",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-06-21T11:15:11.810",
"lastModified": "2026-10-30T13:17:29.567",
"vulnStatus": "Modified",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger\n\nWhen the cpu5wdt module is removing, the origin code uses del_timer() to\nde-activate the timer. If the timer handler is running, del_timer() could\nnot stop it and will return directly. If the port region is released by\nrelease_region() and then the timer handler cpu5wdt_trigger() calls outb()\nto write into the region that is released, the use-after-free bug will\nhappen.\n\nChange del_timer() to timer_shutdown_sync() in order that the timer handler\ncould be finished before the port region is released."
},
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: watchdog: cpu5wdt.c: corrige el error de use-after-free causado por cpu5wdt_trigger Cuando se elimina el módulo cpu5wdt, el código de origen usa del_timer() para desactivar el temporizador. Si el controlador del temporizador se está ejecutando, del_timer() no pudo detenerlo y regresará directamente. Si la región del puerto es liberada por release_region() y luego el controlador del temporizador cpu5wdt_trigger() llama a outb() para escribir en la región que se libera, se producirá el error de use-after-free. Cambie del_timer() a timer_shutdown_sync() para que el controlador del temporizador pueda finalizar antes de que se libere la región del puerto."
}
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