Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 before 7ec8ac9f73d4a9438c2186768d6de27ace37531e; affected ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 before d1dfe21a332d38a6a09658ec29a55940afb5fe36; affected ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 before 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9; affected ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399 before 513024d5a0e34fd34247043f1876b6138ca52847 |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 6.6.117 through 6.6.*; unaffected 6.12.58 through 6.12.*; unaffected 6.17.8 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.