Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4.271, < 4.4.274 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43dPatch
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59bPatch
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5bPatch
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3dPatch
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cbPatch
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504Patch
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9bPatch
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050bPatch
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43dPatch
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59bPatch
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5bPatch
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3dPatch
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cbPatch
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504Patch
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9bPatch
FAQ
What is CVE-2021-47239?
CVE-2021-47239 is a vulnerability with a CVSS score of 7.8 (HIGH). 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") fail...
How severe is CVE-2021-47239?
CVE-2021-47239 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47239?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.