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 |
|---|---|---|
| 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 |
| Linux Kernel | >=2.6.34<4.4.271 | |
| Linux Kernel | >=4.5<4.9.271 | |
| Linux Kernel | >=4.10<4.14.235 | |
| Linux Kernel | >=4.15<4.19.193 | |
| Linux Kernel | >=4.20<5.4.124 | |
| Linux Kernel | >=5.5<5.10.42 | |
| Linux Kernel | >=5.11<5.12.9 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- 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
- https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa
- https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f
- https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc
- https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07
- https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17
- https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0
- https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b
- https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47171?
CVE-2021-47171 is classified as a medium severity vulnerability due to the risk of memory leak.
How do I fix CVE-2021-47171?
To fix CVE-2021-47171, you should update to the patched kernel versions: 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9, or 5.13.
What causes CVE-2021-47171?
CVE-2021-47171 is caused by a memory leak in the smsc75xx_bind function due to non-freed memory during error conditions after allocation.
Which systems are affected by CVE-2021-47171?
CVE-2021-47171 affects various versions of the Linux kernel ranging from 2.6.34 up to 5.13.
Is CVE-2021-47171 remotely exploitable?
CVE-2021-47171 does not have direct indications of remote exploitation, but memory leaks can lead to degraded performance and stability.
- agent/title
- agent/first-publish-date
- agent/type
- agent/author
- agent/weakness
- agent/remedy
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-47171
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup-request
- agent/last-modified-date
- agent/references
- agent/source
- agent/softwarecombine
- agent/description
- agent/tags
- agent/event
- collector/ibm-support
- source/IBM
- package-manager/redhat
- vendor/linux
- canonical/linux kernel
- version/linux kernel/2.6.34
- version/linux kernel/4.5
- version/linux kernel/4.10
- version/linux kernel/4.15
- version/linux kernel/4.20
- version/linux kernel/5.5
- version/linux kernel/5.11
- vendor/ibm
- canonical/ibm security verify governance - identity manager
- version/ibm security verify governance - identity manager/isvg 10.0.2
- canonical/ibm security verify governance, identity manager software stack
- version/ibm security verify governance, identity manager software stack/isvg 10.0.2
- canonical/ibm security verify governance, identity manager virtual appliance
- version/ibm security verify governance, identity manager virtual appliance/isvg 10.0.2
- canonical/ibm security verify governance identity manager container
- version/ibm security verify governance identity manager container/isvg 10.0.2