7.8

CVE-2021-47239

net: usb: fix possible use-after-free in smsc75xx_bind

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.4.271 < 4.4.274
Linux ≫ Linux Kernel Version >= 4.9.271 < 4.9.274
Linux ≫ Linux Kernel Version >= 4.14.235 < 4.14.238
Linux ≫ Linux Kernel Version >= 4.19.193 < 4.19.196
Linux ≫ Linux Kernel Version >= 5.4.124 < 5.4.128
Linux ≫ Linux Kernel Version >= 5.10.42 < 5.10.46
Linux ≫ Linux Kernel Version >= 5.12.9 < 5.12.13
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.134
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d
Patch
https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b
Patch
https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b
Patch
https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d
Patch
https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb
Patch
https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504
Patch
https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b
Patch
https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b
Patch