Tracker / CVE-2021-47239
CVE-2021-47239
High 7.8
In the Linux kernel, the following vulnerability has been resolved: net: usb: fix possible use-after-free in smsc75xx_bind The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset-> smsc75xx_set_multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0]. This patch calls cancel_work_sync to cancel the scheduled work and set the dangling pointer to NULL.
Affected products and versions
| linux | linux_kernel · 4.14.235 → 4.14.238 |
|---|---|
| linux | linux_kernel · 4.19.193 → 4.19.196 |
| linux | linux_kernel · 4.4.271 → 4.4.274 |
| linux | linux_kernel · 4.9.271 → 4.9.274 |
| linux | linux_kernel · 5.10.42 → 5.10.46 |
| linux | linux_kernel · 5.12.9 → 5.12.13 |
| linux | linux_kernel · 5.4.124 → 5.4.128 |
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.