Tracker / CVE-2021-47477
CVE-2021-47477
High 7.8
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.
Affected products and versions
| linux | linux_kernel · 2.6.29 → 4.4.292 |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.255 |
| linux | linux_kernel · 4.15 → 4.19.217 |
| linux | linux_kernel · 4.20 → 5.4.159 |
| linux | linux_kernel · 4.5 → 4.9.290 |
| linux | linux_kernel · 5.11 → 5.14.18 |
| linux | linux_kernel · 5.15 → 5.15.2 |
| linux | linux_kernel · 5.5 → 5.10.79 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.