CVE-2025-40311
Description
In the Linux kernel, the following vulnerability has been resolved: accel/habanalabs: support mapping cb with vmalloc-backed coherent memory When IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return addresses from the vmalloc range. If such an address is mapped without VM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the VM_PFNMAP restriction. Fix this by checking for vmalloc addresses and setting VM_MIXEDMAP in the VMA before mapping. This ensures safe mapping and avoids kernel crashes. The memory is still driver-allocated and cannot be accessed directly by userspace.
How to fix
- Linux Linux8de421db5b1b2b37e9643ea7f6ade90fd756892d, 7ec8ac9f73d4a9438c2186768d6de27ace37531e, d1dfe21a332d38a6a09658ec29a55940afb5fe36, 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9, 513024d5a0e34fd34247043f1876b6138ca52847 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 ≤ v < 8de421db5b1b2b37e9643ea7f6ade90fd756892d, ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 ≤ v < 7ec8ac9f73d4a9438c2186768d6de27ace37531e, ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 ≤ v < d1dfe21a332d38a6a09658ec29a55940afb5fe36, ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 ≤ v < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9, ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 ≤ v < 513024d5a0e34fd34247043f1876b6138ca52847, 5.8 | 8de421db5b1b2b37e9643ea7f6ade90fd756892d, 7ec8ac9f73d4a9438c2186768d6de27ace37531e, d1dfe21a332d38a6a09658ec29a55940afb5fe36, 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9, 513024d5a0e34fd34247043f1876b6138ca52847 |
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