CVE-2026-89814
Description
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.
How to fix
- Linux Linux964de255497ffd7cb8a86e405b8ac6d927e7e177, 0bfb938182d1313e5cac32ae38dbaaa4eabe4af4, b30900566642ceb2c9e12b56c2afec28d0fd91a0, 6.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 ≤ v < 964de255497ffd7cb8a86e405b8ac6d927e7e177, bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 ≤ v < 0bfb938182d1313e5cac32ae38dbaaa4eabe4af4, bd22e44ad415ac22e3a4f9a983d2a085f6cb4427 ≤ v < b30900566642ceb2c9e12b56c2afec28d0fd91a0, 4277dc1942a8979abe1ef2b55069f42497f885c0, 6.14.9 ≤ v < 6.15, 6.15 | 964de255497ffd7cb8a86e405b8ac6d927e7e177, 0bfb938182d1313e5cac32ae38dbaaa4eabe4af4, b30900566642ceb2c9e12b56c2afec28d0fd91a0, 6.15 |
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Attack Surface Management
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