CVE-2026-89814
drm/amdgpu: clamp the isolation index for rings outside a partition
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
| Last Updated | Oct 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 < 964de255497ffd7cb8a86e405b8ac6d927e7e177 bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 < 0bfb938182d1313e5cac32ae38dbaaa4eabe4af4 bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 < b30900566642ceb2c9e12b56c2afec28d0fd91a0 4277dc1942a8979abe1ef2b55069f42497f885c0 6.14.9 < 6.15
Linux / Linux
6.15