What is CVE-2021-47171?

CVE-2021-47171 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 2.6.34 onward and patched in 4.4.271, 4.9.271, 4.14.235 and others. CVE-2021-47171 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47171?

CVE-2021-47171 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47171?

Yes, CVE-2021-47171 has been patched. Fixed versions include 4.4.271, 4.9.271, 4.14.235 and others. If you are running Linux kernel 2.6.34 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47171 actively exploited?

CVE-2021-47171 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2021-47171

Medium

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

Package Linux Kernel

Published 2024-03-25

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2021-47171 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.34 and later are affected. Fixed in 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 2.6.34

Fixed in

✓ 4.4.271 4.4.x ✓ 4.9.271 4.9.x ✓ 4.14.235 4.14.x ✓ 4.19.193 4.19.x ✓ 5.4.124 5.4.x ✓ 5.10.42 5.10.x ✓ 5.12.9 5.12.x ✓ 5.13

References

8 total

Kernel Git
https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa

Patch
Kernel Git
https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f

Patch
Kernel Git
https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70

Patch
Kernel Git
https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0

Patch
Kernel Git
https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47171

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47171?

CVE-2021-47171 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 2.6.34 onward and has been patched in 4.4.271, 4.9.271, 4.14.235 and others. CVE-2021-47171 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47171?

CVE-2021-47171 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47171?

Yes. CVE-2021-47171 has been patched. Fixed versions include 4.4.271, 4.9.271, 4.14.235 and others. If you are running Linux kernel 2.6.34 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47171 actively exploited?

No. CVE-2021-47171 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.