// For flags

CVE-2023-52584

spmi: mediatek: Fix UAF on device remove

Severity Score

3.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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

spmi: mediatek: Fix UAF on device remove

The pmif driver data that contains the clocks is allocated along with
spmi_controller.
On device remove, spmi_controller will be freed first, and then devres
, including the clocks, will be cleanup.
This leads to UAF because putting the clocks will access the clocks in
the pmif driver data, which is already freed along with spmi_controller.

This can be reproduced by enabling DEBUG_TEST_DRIVER_REMOVE and
building the kernel with KASAN.

Fix the UAF issue by using unmanaged clk_bulk_get() and putting the
clocks before freeing spmi_controller.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: spmi: mediatek: reparar UAF en la eliminación del dispositivo. Los datos del controlador pmif que contienen los relojes se asignan junto con spmi_controller. Al eliminar el dispositivo, primero se liberará spmi_controller y luego se limpiarán los devres, incluidos los relojes. Esto lleva a UAF porque al poner los relojes se accederá a los relojes en los datos del controlador pmif, que ya están liberados junto con spmi_controller. Esto se puede reproducir habilitando DEBUG_TEST_DRIVER_REMOVE y compilando el kernel con KASAN. Solucione el problema de UAF utilizando clk_bulk_get() no administrado y poniendo los relojes antes de liberar spmi_controller.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
Poc
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-03-02 CVE Reserved
  • 2024-03-06 CVE Published
  • 2024-03-06 EPSS Updated
  • 2024-08-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.1.77
Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.77"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.6.16
Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.16"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.7.4
Search vendor "Linux" for product "Linux Kernel" and version " < 6.7.4"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.8
Search vendor "Linux" for product "Linux Kernel" and version " < 6.8"
en
Affected