NetSight
IP …
high7.8

CVE-2021-47477

In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typically mapped for DMA …

Impact

In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typically mapped for DMA and must not be allocated on the stack or transfers will fail. Allocate proper transfer buffers in the various command helpers and return an error on short transfers instead of acting on random stack data. Note that this also fixes a stack info leak on systems where DMA is not used as 32 bytes are always sent to the device regardless of how short the command is.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.29 before 4.4.292
from 4.5 before 4.9.290
from 4.10 before 4.14.255
from 4.15 before 4.19.217
from 4.20 before 5.4.159
from 5.5 before 5.10.79

Weakness classification

CWE-787

References