CVE-2021-47171: net: usb: fix memory leak in smsc75xx_bind
First published: Mon Mar 25 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind(). The problem was is non-freed memory in case of errors after memory allocation. backtrace: [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460 [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=2.6.34<4.4.271 | |
| Linux Linux kernel | >=4.5<4.9.271 | |
| Linux Linux kernel | >=4.10<4.14.235 | |
| Linux Linux kernel | >=4.15<4.19.193 | |
| Linux Linux kernel | >=4.20<5.4.124 | |
| Linux Linux kernel | >=5.5<5.10.42 | |
| Linux Linux kernel | >=5.11<5.12.9 | |
| redhat/kernel | <4.4.271 | 4.4.271 |
| redhat/kernel | <4.9.271 | 4.9.271 |
| redhat/kernel | <4.14.235 | 4.14.235 |
| redhat/kernel | <4.19.193 | 4.19.193 |
| redhat/kernel | <5.4.124 | 5.4.124 |
| redhat/kernel | <5.10.42 | 5.10.42 |
| redhat/kernel | <5.12.9 | 5.12.9 |
| redhat/kernel | <5.13 | 5.13 |
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Reference Links
- https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa
- https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f
- https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70
- https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0
- https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b
- https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07
- https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc
- https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17
- https://access.redhat.com/security/cve/CVE-2021-47171
- https://lore.kernel.org/linux-cve-announce/2024032536-CVE-2021-47171-f223@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:3618
- https://access.redhat.com/errata/RHSA-2024:3627
- https://bugzilla.redhat.com/show_bug.cgi?id=2271469
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