mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
synced 2025-05-30 02:00:53 +00:00
24 lines
1.6 KiB
JSON
24 lines
1.6 KiB
JSON
|
{
|
||
|
|
"id": "CVE-2021-47140",
|
||
|
|
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
||
|
|
"published": "2024-03-25T09:15:08.740",
|
||
|
|
"lastModified": "2024-03-25T09:15:08.740",
|
||
|
|
"vulnStatus": "Received",
|
||
|
|
"descriptions": [
|
||
|
|
{
|
||
|
|
"lang": "en",
|
||
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Clear DMA ops when switching domain\n\nSince commit 08a27c1c3ecf (\"iommu: Add support to change default domain\nof an iommu group\") a user can switch a device between IOMMU and direct\nDMA through sysfs. This doesn't work for AMD IOMMU at the moment because\ndev->dma_ops is not cleared when switching from a DMA to an identity\nIOMMU domain. The DMA layer thus attempts to use the dma-iommu ops on an\nidentity domain, causing an oops:\n\n # echo 0000:00:05.0 > /sys/sys/bus/pci/drivers/e1000e/unbind\n # echo identity > /sys/bus/pci/devices/0000:00:05.0/iommu_group/type\n # echo 0000:00:05.0 > /sys/sys/bus/pci/drivers/e1000e/bind\n ...\n BUG: kernel NULL pointer dereference, address: 0000000000000028\n ...\n Call Trace:\n iommu_dma_alloc\n e1000e_setup_tx_resources\n e1000e_open\n\nSince iommu_change_dev_def_domain() calls probe_finalize() again, clear\nthe dma_ops there like Vt-d does."
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"metrics": {},
|
||
|
|
"references": [
|
||
|
|
{
|
||
|
|
"url": "https://git.kernel.org/stable/c/d6177a6556f853785867e2ec6d5b7f4906f0d809",
|
||
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"url": "https://git.kernel.org/stable/c/f3f2cf46291a693eab21adb94171b0128c2a9ec1",
|
||
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|