CVE-2026-43274

In the Linux kernel, the following vulnerability has been resolved: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq() The cluster_cfg array is dynamically allocated to hold per-CPU configuration structures, with its size based on the number of online CPUs. Previously, this array was indexed using hartid, which may be non-contiguous or exceed the bounds of the array, leading to out-of-bounds access. Switch to using cpuid as the index, as it is guaranteed to be within the valid range provided by for_each_online_cpu().

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c	Patch
https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867	Patch
https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d	Patch

Configurations

Configuration 1 (hide)

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

History

11 Nov 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: mailbox: mchp-ipc-sbi: corrección de acceso fuera de límites en mchp_ipc_get_cluster_aggr_irq() El array cluster_cfg se asigna dinámicamente para contener estructuras de configuración por CPU, con su tamaño basado en el número de CPUs en línea. Anteriormente, este array se indexaba usando hartid, lo que puede ser no contiguo o exceder los límites del array, llevando a un acceso fuera de límites. Se cambia a usar cpuid como índice, ya que se garantiza que está dentro del rango válido proporcionado por for_each_online_cpu().

Information

Published : 2026-05-06 12:16

Updated : 2026-11-11 23:10

NVD link : CVE-2026-43274

Mitre link : CVE-2026-43274

CVE.ORG link : CVE-2026-43274

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

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