CVE-2022-42716

Arm Mali CSF KBASE_REG_NO_USER_FREE Unsafe Use Use-After-Free

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

An issue was discovered in the Arm Mali GPU Kernel Driver. There is a use-after-free. A non-privileged user can make improper GPU processing operations to gain access to already freed memory. This affects Valhall r29p0 through r40P0.

Se descubrió un problema en el controlador del kernel de GPU Arm Mali. Hay un use after free. Un usuario sin privilegios puede realizar operaciones de procesamiento de GPU incorrectas para obtener acceso a la memoria ya liberada. Esto afecta a Valhall r29p0 a r40P0.

The Mali driver tries to use the KBASE_REG_NO_USER_FREE flag to ensure that the memory region referenced by kbase_csf_tiler_heap::buf_desc_reg cannot be freed by userspace. However, this flag is only a single bit, and there can be multiple tiler heaps referencing the same memory region. This can lead to a use-after-free condition.

*Credits: N/A

CVSS Scores

NISTv3.1 8.8

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2022-10-10 CVE Reserved
2022-12-12 CVE Published
2024-07-04 EPSS Updated
2024-10-15 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (2)

URL	Tag	Source
http://packetstormsecurity.com/files/170420/Arm-Mali-CSF-KBASE_REG_NO_USER_FREE-Unsafe-Use-Use-After-Free.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities	2023-12-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Arm Search vendor "Arm"		Valhall Gpu Kernel Driver Search vendor "Arm" for product "Valhall Gpu Kernel Driver"				>= r29p0 <= r40p0 Search vendor "Arm" for product "Valhall Gpu Kernel Driver" and version " >= r29p0 <= r40p0"		-		Affected