CVE-2026-23432 in Kernel

Sumário (Inglês)

In the Linux kernel, the following vulnerability has been resolved:

mshv: Fix use-after-free in mshv_map_user_memory error path

In the error path of mshv_map_user_memory(), calling vfree() directly on
the region leaves the MMU notifier registered. When userspace later unmaps
the memory, the notifier fires and accesses the freed region, causing a
use-after-free and potential kernel panic.

Replace vfree() with mshv_partition_put() to properly unregister
the MMU notifier before freeing the region.

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Responsável

Linux

Reservar

13/01/2026

Divulgação

03/04/2026

Estado

Confirmado

Inscrições

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidade	CWE	Exp	Con	CVE
355112	Linux Kernel mshv mshv_map_user_memory Excesso de tampão	416	Não definido	Correção oficial	CVE-2026-23432

Fontes

• MITRE
• NVD
• CVE Details