CVE-2026-98518
Description
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/dmem: pin VRAM for the whole registered range Commit c32287471077 ("gpu/drm/nouveau: enable THP support for GPU memory migration") grew the device-private region that nouveau_dmem_chunk_alloc() registers from DMEM_CHUNK_SIZE to DMEM_CHUNK_SIZE * NR_CHUNKS, but left the VRAM buffer object backing that region at DMEM_CHUNK_SIZE. nouveau_dmem_page_addr() returns chunk->bo->offset plus the page's offset within the registered region, so every page past the first chunk resolves to VRAM outside the buffer object. Size the buffer object to the region it backs.
How to fix
- Linux Linux06c69c64686a31783c8bec6495dc22822d38c4ce, 64ca4cdd1031206424e6455f0ae4fb0560d8f46a or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c3228747107705d47c7e9a03598a434a0380cb73 ≤ v < 06c69c64686a31783c8bec6495dc22822d38c4ce, c3228747107705d47c7e9a03598a434a0380cb73 ≤ v < 64ca4cdd1031206424e6455f0ae4fb0560d8f46a, 6.19 | 06c69c64686a31783c8bec6495dc22822d38c4ce, 64ca4cdd1031206424e6455f0ae4fb0560d8f46a |
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