CVE-2021-47239 - CVE House
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Status published High CVE-2021-47239

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

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
200dbfcad8011e50c3cec269ed7b980836eeb1fa, 22c840596af0c09068b6cf948616e6496e59e07f, 9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc, 9e6a3eccb28779710cbbafc4f4258d92509c6d07, b95fb96e6339e34694dd578fb6bde3575b01af17, 635ac38b36255d3cfb8312cf7c471334f4d537e0, 70c886ac93f87ae7214a0c69151a28a8075dd95b, 46a8b29c6306d8bbfd92b614ef65a47c900d8e70, 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9

Timeline

Official Publish: May 21st, 2024
Last Modified: May 11th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.