drm/amdgpu: skip the VMID 0 flush for VRAM
Clear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches
via its direct MC address without programming a GART window, yet the wipe
still forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA
flush can wedge the engine; only flush when a GART window is actually used.
v2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed,
and drive the clear and copy paths from that. (Christian)
v3: Make the vm_needs_flush output parameter mandatory instead of
allowing NULL. (Christian)
(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 21 Oct 2026 13:15:00 +0000
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Thu, 15 Oct 2026 13:30:00 +0000
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Thu, 01 Oct 2026 07:00:00 +0000
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| Weaknesses | CWE-665 |
Wed, 30 Sep 2026 00:15:00 +0000
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| Weaknesses | CWE-440 | |
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| Metrics |
threat_severity
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cvssV3_1
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Fri, 25 Sep 2026 21:45:00 +0000
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| Weaknesses | CWE-665 |
Fri, 25 Sep 2026 10:30:00 +0000
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| Description | In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: skip the VMID 0 flush for VRAM Clear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches via its direct MC address without programming a GART window, yet the wipe still forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA flush can wedge the engine; only flush when a GART window is actually used. v2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed, and drive the clear and copy paths from that. (Christian) v3: Make the vm_needs_flush output parameter mandatory instead of allowing NULL. (Christian) (cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9) | |
| Title | drm/amdgpu: skip the VMID 0 flush for VRAM | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
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Projects
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-21T12:53:39.969Z
Reserved: 2026-09-25T10:18:58.203Z
Link: CVE-2026-97928
No data.
Status : Received
Published: 2026-09-25T11:17:20.063
Modified: 2026-10-21T13:21:16.320
Link: CVE-2026-97928
OpenCVE Enrichment
Updated: 2026-10-01T08:45:03Z