CVE-2021-47239
net: usb: fix possible use-after-free in smsc75xx_bind
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net:usb: corrige posible use after free en smsc75xx_bind. La confirmación 46a8b29c6306 ("net:usb: corrige la pérdida de memoria en smsc75xx_bind") no logra limpiar el trabajo programado en smsc75xx_reset -> smsc75xx_set_multicast, lo que genera use after free si el trabajo está programado para comenzar después de la desasignación. Además, este parche también elimina un puntero colgante: dev->data[0]. Este parche llama a cancel_work_sync para cancelar el trabajo programado y establecer el puntero colgante en NULL.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-04-10 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (15)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa | Vuln. Introduced | |
| https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f | Vuln. Introduced | |
| https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc | Vuln. Introduced | |
| https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4.271 < 4.4.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4.271 < 4.4.274" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9.271 < 4.9.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9.271 < 4.9.274" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.14.235 < 4.14.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.14.235 < 4.14.238" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19.193 < 4.19.196 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.193 < 4.19.196" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.4.124 < 5.4.128 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.124 < 5.4.128" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10.42 < 5.10.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.42 < 5.10.46" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12.9 < 5.12.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12.9 < 5.12.13" | en |
Affected
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