CVE-2021-47239

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux200dbfcad8011e50c3cec269ed7b980836eeb1fa < 7cc8b2e05fcea6edd022d26e82091d781af8fd9baffected
LinuxLinux22c840596af0c09068b6cf948616e6496e59e07f < 64160d1741a3de5204d1a822e058e0b4cc526504affected
LinuxLinux9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc < c4e3be2e7742863e454ce31faf8fd0109c00050baffected
LinuxLinux9e6a3eccb28779710cbbafc4f4258d92509c6d07 < 2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59baffected
LinuxLinuxb95fb96e6339e34694dd578fb6bde3575b01af17 < 4252bf6c2b245f47011098113d405ffad6ad5d5baffected
LinuxLinux635ac38b36255d3cfb8312cf7c471334f4d537e0 < 570a52cf3e01d19f7fd1a251dfc52b0cd86c13cbaffected
LinuxLinux70c886ac93f87ae7214a0c69151a28a8075dd95b < 14616c372a7be01a2fb8c56c9d8debd232b9e43daffected
LinuxLinux46a8b29c6306d8bbfd92b614ef65a47c900d8e70 < 56b786d86694e079d8aad9b314e015cd4ac02a3daffected
LinuxLinux4.4.271 < 4.4.274affected
LinuxLinux4.9.271 < 4.9.274affected
LinuxLinux4.14.235 < 4.14.238affected
LinuxLinux4.19.193 < 4.19.196affected
LinuxLinux5.4.124 < 5.4.128affected
LinuxLinux5.10.42 < 5.10.46affected
LinuxLinux5.12.9 < 5.12.13affected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References