CVE-2021-47477
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedMay 22, 2024
First seenMay 22, 2024
How to fix
Update
- linux linux_kernel4.4.292, 4.9.290, 4.14.255, 4.19.217, 5.4.159, 5.10.79, 5.14.18, 5.15.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.29 ≤ v < 4.4.292, 4.5 ≤ v < 4.9.290, 4.10 ≤ v < 4.14.255, 4.15 ≤ v < 4.19.217, 4.20 ≤ v < 5.4.159, 5.5 ≤ v < 5.10.79, 5.11 ≤ v < 5.14.18, 5.15 ≤ v < 5.15.2 | 4.4.292, 4.9.290, 4.14.255, 4.19.217, 5.4.159, 5.10.79, 5.14.18, 5.15.2 |
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