CVE-2021-47239
net: usb: fix possible use-after-free in smsc75xx_bind
HIGH 7.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.23 % · percentile 14 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-33887
- GCVE · GCVE-0-2021-47239
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0529 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0526 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0496 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.4.271 < 4.4.274cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9.271 < 4.9.274cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.14.235 < 4.14.238cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19.193 < 4.19.196cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4.124 < 5.4.128cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.42 < 5.10.46cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.12.9 < 5.12.13
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 200dbfcad8011e50c3cec269ed7b980836eeb1fa < 7cc8b2e05fcea6edd022d26e82091d781af8fd9b ; affected 22c840596af0c09068b6cf948616e6496e59e07f < 64160d1741a3de5204d1a822e058e0b4cc526504 ; affected 9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc < c4e3be2e7742863e454ce31faf8fd0109c00050b ; affected 9e6a3eccb28779710cbbafc4f4258d92509c6d07 < 2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b ; affected b95fb96e6339e34694dd578fb6bde3575b01af17 < 4252bf6c2b245f47011098113d405ffad6ad5d5b ; affected 635ac38b36255d3cfb8312cf7c471334f4d537e0 < 570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb |
| Linux · Linux | 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 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |