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CVE-2021-47239
net: usb: fix possible use-after-free in smsc75xx_bind
High7.8EPSS 0.23%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 200dbfcad8011e50c3cec269ed7b980836eeb1fa – < 7cc8b2e05fcea6edd022d26e82091d781af8fd9b
- affected 22c840596af0c09068b6cf948616e6496e59e07f – < 64160d1741a3de5204d1a822e058e0b4cc526504
- affected 9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc – < c4e3be2e7742863e454ce31faf8fd0109c00050b
- affected 9e6a3eccb28779710cbbafc4f4258d92509c6d07 – < 2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b
- affected b95fb96e6339e34694dd578fb6bde3575b01af17 – < 4252bf6c2b245f47011098113d405ffad6ad5d5b
- affected 635ac38b36255d3cfb8312cf7c471334f4d537e0 – < 570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb
- affected 70c886ac93f87ae7214a0c69151a28a8075dd95b – < 14616c372a7be01a2fb8c56c9d8debd232b9e43d
- affected 46a8b29c6306d8bbfd92b614ef65a47c900d8e70 – < 56b786d86694e079d8aad9b314e015cd4ac02a3d
- affected 4.4.271 – < 4.4.274
- affected 4.9.271 – < 4.9.274
- affected 4.14.235 – < 4.14.238
- affected 4.19.193 – < 4.19.196
- affected 5.4.124 – < 5.4.128
- affected 5.10.42 – < 5.10.46
- affected 5.12.9 – < 5.12.13
References (8)
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2021-47239)Record last updated .