CVE-2020-12138

Name: CVE-2020-12138
Creator: NVD / NIST
Published: 2020-04-27T15:15:12.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.32%

Last modified Jun 17, 2026

CVE-2020-12138 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 3.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.32%

87.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Amd	Atillk64	5.11.9.0

References

https://eclypsium.com/2019/11/12/mother-of-all-drivers/Third Party Advisory
https://h0mbre.github.io/atillk64_exploit/Exploit, Third Party Advisory
https://eclypsium.com/2019/11/12/mother-of-all-drivers/Third Party Advisory
https://h0mbre.github.io/atillk64_exploit/Exploit, Third Party Advisory

Timeline

Published: Apr 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12138?

How severe is CVE-2020-12138?

CVE-2020-12138 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.32% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12138?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12138?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST