CVE-2025-21817

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  3. CVE-2025-21817

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

References
Link Resource
https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31 Patch
https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c Patch
Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*
History

28 Oct 2025, 02:53

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31 - () https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31 - Patch
References () https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c - () https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: mark GFP_NOIO around sysfs ->store() sysfs ->store se llama con la cola congelada, mientras tanto tenemos varias devoluciones de llamadas ->store() (update_nr_requests, wbt, scheduler) para asignar memoria con GFP_KERNEL que puede ejecutarse en una ruta de código de recuperación directa, lo que puede provocar un posible bloqueo. Solucione el problema marcando NOIO alrededor de sysfs ->store()
CPE cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-667

27 Feb 2025, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-27 20:16

Updated : 2025-10-28 02:53

NVD link : CVE-2025-21817

Mitre link : CVE-2025-21817

CVE.ORG link : CVE-2025-21817

JSON object : View

Products Affected

linux

CWE
CWE-667

Improper Locking