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TI-2020-09770 Aliases CVE-2020-12138GHSA-crg4-9cvh-c76f

AMD ATI atillk64.sys 5.11.9.0 allows low-privileged users to interact directly with…

Priority MEDIUM 44CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

EPSS 0.03322 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amd:atillk64:5.11.9.0:*:*:*:*:*:*:*5.11.9.0VulnerableAMD
  • cpe:2.3:a:amd:atillk64:5.11.9.0:*:*:*:*:*:*:* Versions 5.11.9.0 Vulnerable ·AMD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12138
  2. 2026-10-03 Alias added: GHSA-crg4-9cvh-c76f

References

Exploit 1

Advisory 1

  • TI-2019-05137 An issue was discovered in atillk64.sys in AMD ATI Diagnostics Hardware Abstraction… CVSS 3.1MEDIUM 6.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences