What is CVE-2021-47416?

CVE-2021-47416 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 2.6.28 onward and patched in 4.4.289, 4.9.287, 4.14.251 and others. CVE-2021-47416 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47416?

CVE-2021-47416 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-2021-47416?

Yes, CVE-2021-47416 has been patched. Fixed versions include 4.4.289, 4.9.287, 4.14.251 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47416 actively exploited?

CVE-2021-47416 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-2021-47416

Medium

In the Linux kernel, the following vulnerability has been resolved: phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED _before_ calling device_register(), because put_device() should be called even in case of device_register() failure.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-31

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-2021-47416 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 2.6.28 and later are affected. Fixed in 4.4.289, 4.9.287, 4.14.251, 4.19.211, 5.4.153, 5.10.73, 5.14.12, 5.15 and their respective stable series.

Affected from

≥ 2.6.28

Fixed in

✓ 4.4.289 4.4.x ✓ 4.9.287 4.9.x ✓ 4.14.251 4.14.x ✓ 4.19.211 4.19.x ✓ 5.4.153 5.4.x ✓ 5.10.73 5.10.x ✓ 5.14.12 5.14.x ✓ 5.15

References

8 total

Kernel Git
https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d

Patch
Kernel Git
https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a

Patch
Kernel Git
https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7

Patch
Kernel Git
https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f

Patch
Kernel Git
https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47416

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-31

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47416?

CVE-2021-47416 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 2.6.28 onward and has been patched in 4.4.289, 4.9.287, 4.14.251 and others. CVE-2021-47416 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47416?

CVE-2021-47416 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-2021-47416?

Yes. CVE-2021-47416 has been patched. Fixed versions include 4.4.289, 4.9.287, 4.14.251 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47416 actively exploited?

No. CVE-2021-47416 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.