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CVE-2021-47477

HIGH

7.8

Description

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.

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published5/22/2024

Last Modified9/24/2025

Sourcenvd

Honeypot Sightings0

Affected Products

linux:linux_kernel

Weaknesses (CWE)

CWE-787

References

https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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