CVE-2021-47239

medium

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.

References

https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b

https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b

https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504

https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb

https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d

https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b

https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b

https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d

Details

Source: Mitre, NVD

Published: 2024-05-21

Updated: 2024-05-21

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium