CVE-2021-47239
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability14. percentile0.2%
Product
Linux Kernel
PublishedMay 21, 2024
First seenMay 21, 2024
How to fix
Update
- linux linux_kernel4.4.274, 4.9.274, 4.14.238, 4.19.196, 5.4.128, 5.10.46, 5.12.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.4.271 ≤ v < 4.4.274, 4.9.271 ≤ v < 4.9.274, 4.14.235 ≤ v < 4.14.238, 4.19.193 ≤ v < 4.19.196, 5.4.124 ≤ v < 5.4.128, 5.10.42 ≤ v < 5.10.46, 5.12.9 ≤ v < 5.12.13 | 4.4.274, 4.9.274, 4.14.238, 4.19.196, 5.4.128, 5.10.46, 5.12.13 |
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