CVE-2024-38630

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4	Patch
https://git.kernel.org/stable/c/948ed659c0151a605bd126da1e95f350ec5a7956
https://git.kernel.org/stable/c/9abe50e8492d1accd7d8dc17991179472d3d4573
https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314	Patch
https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a	Patch
https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4	Patch
https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314	Patch
https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

30 Oct 2026, 13:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/948ed659c0151a605bd126da1e95f350ec5a7956 - () https://git.kernel.org/stable/c/9abe50e8492d1accd7d8dc17991179472d3d4573 -

Information

Published : 2024-06-21 11:15

Updated : 2026-10-30 13:17

NVD link : CVE-2024-38630

Mitre link : CVE-2024-38630

CVE.ORG link : CVE-2024-38630

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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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."}, {"lang": "es", "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 m\u00f3dulo cpu5wdt, el c\u00f3digo de origen usa del_timer() para desactivar el temporizador. Si el controlador del temporizador se est\u00e1 ejecutando, del_timer() no pudo detenerlo y regresar\u00e1 directamente. Si la regi\u00f3n del puerto es liberada por release_region() y luego el controlador del temporizador cpu5wdt_trigger() llama a outb() para escribir en la regi\u00f3n que se libera, se producir\u00e1 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 regi\u00f3n del puerto."}], "lastModified": "2026-10-30T13:17:29.567", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CFD35FD5-8F34-4C7B-803E-84957DD73AFF", "versionEndExcluding": "6.6.33", "versionStartIncluding": "3.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "991B9791-966A-4D18-9E8D-A8AB128E5627", "versionEndExcluding": "6.9.4", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}