Privilege Escalation and Denial of Service Vulnerability in Arm Mali GPU Driver
CVE-2021-28664

8.8HIGH

Key Information:

Vendor

Arm
Status
Bifrost Gpu Kernel Driver
Midguard Gpu Kernel Driver
Valhall Gpu Kernel Driver
Vendor
CVE Published:
10 May 2021

Badges

👾 Exploit Exists🟡 Public PoC🦅 CISA Reported

What is CVE-2021-28664?

The Arm Mali GPU kernel driver exhibits a significant vulnerability allowing unprivileged users to obtain read/write access to restricted pages. This flaw can result in privilege escalation or cause a denial of service through memory corruption. The affected versions include various releases of the Bifrost, Valhall, and Midgard architectures, which can have severe implications for system security.

CISA has reported CVE-2021-28664

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-28664 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-28664-PoC
Created by woaphone

References

https://developer.arm.com/support/arm-security-updates
https://developer.arm.com/support/arm-security-updates/ma...
https://developer.arm.com/Arm%20Security%20Center/Mali%20...

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.