VULNERABILITY INTELLIGENCE

CVE-2021-47477

CVSS score5.3 MEDIUM
EPSS probability0.72%
CISA KEVNot currently listed
Published2024-05-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Weakness classification

  • CWE-787: Out-of-bounds Write

Primary references