CVE-2026-89814

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: clamp the isolation index for rings outside a partition adev->isolation[] has one slot per partition, but a ring that is not assigned to one keeps AMDGPU_XCP_NO_PARTITION, which is ~0, so indexing the array with it is out of bounds. SDMA submissions hit this on both the isolation enforcement and the VM flush path and trip UBSAN. Fall back to the first slot the way the cleaner shader path already does, and stop taking the address before the ring type check that makes it relevant.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0bfb938182d1313e5cac32ae38dbaaa4eabe4af4
https://git.kernel.org/stable/c/964de255497ffd7cb8a86e405b8ac6d927e7e177
https://git.kernel.org/stable/c/b30900566642ceb2c9e12b56c2afec28d0fd91a0

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8

Information

Published : 2026-09-16 11:16

Updated : 2026-09-17 10:17

NVD link : CVE-2026-89814

Mitre link : CVE-2026-89814

CVE.ORG link : CVE-2026-89814

JSON object : View

Products Affected

No product.

CWE

No CWE.

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