Known exploited · Arm
CVE-2021-28664: Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability
What it is
Arm Mali Graphics Processing Unit (GPU) kernel driver contains an unspecified vulnerability that may allow a non-privileged user to gain write access to read-only memory, gain root privilege, corrupt memory, and modify the memory of other processes.
- Vendor
- Arm
- Product
- Mali Graphics Processing Unit (GPU)
- Added to KEV
- November 3, 2021
- CISA due date
- November 17, 2021
- Ransomware use
- Unknown
- Weakness
- CWE-787: Out-of-bounds Write
What CISA requires
Apply updates per vendor instructions.
Forensic triage
No
What to do now
- Find every instance of Mali Graphics Processing Unit (GPU) you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before November 17, 2021 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
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Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.