CVE-2024-46738

/// Technical description

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

VMCI: Fix use-after-free when removing resource in vmci_resource_remove()

When removing a resource from vmci_resource_table in

vmci_resource_remove(), the search is performed using the resource

handle by comparing context and resource fields.

It is possible though to create two resources with different types

but same handle (same context and resource fields).

When trying to remove one of the resources, vmci_resource_remove()

may not remove the intended one, but the object will still be freed

as in the case of the datagram type in vmci_datagram_destroy_handle().

vmci_resource_table will still hold a pointer to this freed resource

leading to a use-after-free vulnerability.

BUG: KASAN: use-after-free in vmci_handle_is_equal include/linux/vmw_vmci_defs.h:142 [inline]

BUG: KASAN: use-after-free in vmci_resource_remove+0x3a1/0x410 drivers/misc/vmw_vmci/vmci_resource.c:147

Read of size 4 at addr ffff88801c16d800 by task

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References