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CVE-2021-47239

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CVE-2021-47239

Published: May 21, 2024

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
200dbfcad8011e50c3cec269ed7b980836eeb1fa - < 7cc8b2e05fcea6edd022d26e82091d781af8fd9b
affected
22c840596af0c09068b6cf948616e6496e59e07f - < 64160d1741a3de5204d1a822e058e0b4cc526504
affected
9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc - < c4e3be2e7742863e454ce31faf8fd0109c00050b
affected
9e6a3eccb28779710cbbafc4f4258d92509c6d07 - < 2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b
affected
b95fb96e6339e34694dd578fb6bde3575b01af17 - < 4252bf6c2b245f47011098113d405ffad6ad5d5b

+3 more versions

Linux

Linux

affected
4.4.271 - < 4.4.274
affected
4.9.271 - < 4.9.274
affected
4.14.235 - < 4.14.238
affected
4.19.193 - < 4.19.196
affected
5.4.124 - < 5.4.128

+2 more versions

References

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