CVE-2020-12138
CVSS v3
8.8
HIGH
EPSS Score
3.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
AMD ATI atillk64.sys 5.11.9.0 allows low-privileged users to interact directly with physical memory by calling one of several driver routines that map physical memory into the virtual address space of the calling process. This could enable low-privileged users to achieve NT AUTHORITY\\SYSTEM privileges via a DeviceIoControl call associated with MmMapIoSpace, IoAllocateMdl, MmBuildMdlForNonPagedPool, or MmMapLockedPages.
Technical details
- Published
- 2020-04-27
Frequently asked questions
What is CVE-2020-12138?
AMD ATI atillk64.sys 5.11.9.0 allows low-privileged users to interact directly with physical memory by calling one of several driver routines that map physical memory into the virtual address space of the calling process. This could enable low-privileged users to achieve NT AUTHORITY\\SYSTEM privileges via a DeviceIoControl call associated with MmMapIoSpace, IoAllocateMdl, MmBuildMdlForNonPagedPool, or MmMapLockedPages.
Is CVE-2020-12138 actively exploited?
Active exploitation of CVE-2020-12138 has not been confirmed. Its EPSS score was 3.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-12138?
CVE-2020-12138 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2020-12138 affecting your environment?
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