comedi: dt9812: fix DMA buffers on stack
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.7%
exploitation probability
0.7%top 49% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757ehttps://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12edhttps://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efehttps://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723