GoogleOSV:CVE-2021-47477CVE-2021-47477
AI Score
Confidence
Low
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.
References
git.kernel.org/linus/536de747bc48262225889a533db6650731ab25d3
git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e
git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2
git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3
git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed
git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe
git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3
git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6
git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97
git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723
ubuntu.com/security/CVE-2021-47477
www.cve.org/CVERecord?id=CVE-2021-47477
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