What is CVE-2021-47368?

CVE-2021-47368 is a High severity Linux kernel vulnerability with a CVSS score of 8.1 out of 10, classified as a Uncontrolled Resource Consumption flaw (CWE-400), affecting Linux kernel versions from 5.1 onward and patched in 5.4.150, 5.10.70, 5.14.9 and others. CVE-2021-47368 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47368?

CVE-2021-47368 has a CVSS score of 8.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2021-47368?

Yes, CVE-2021-47368 has been patched. Fixed versions include 5.4.150, 5.10.70, 5.14.9 and others. If you are running Linux kernel 5.1 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47368 actively exploited?

CVE-2021-47368 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/400.html

CVE-2021-47368

High

In the Linux kernel, the following vulnerability has been resolved: enetc: Fix illegal access when reading affinity_hint irq_set_affinity_hit() stores a reference to the cpumask_t parameter in the irq descriptor, and that reference can be accessed later from irq_affinity_hint_proc_show(). Since the cpu_mask parameter passed to irq_set_affinity_hit() has only temporary storage (it's on the stack memory), later accesses to it are illegal. Thus reads from the corresponding procfs affinity_hint file can result in paging request oops. The issue is fixed by the get_cpu_mask() helper, which provides a permanent storage for the cpumask_t parameter.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.1

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-400

CVE-2021-47368 is a Uncontrolled Resource Consumption vulnerability

What is Uncontrolled Resource Consumption?

The product does not properly control the amount of resources it consumes, leading to exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.1 and later are affected. Fixed in 5.4.150, 5.10.70, 5.14.9, 5.15 and their respective stable series.

Affected from

≥ 5.1

Fixed in

✓ 5.4.150 5.4.x ✓ 5.10.70 5.10.x ✓ 5.14.9 5.14.x ✓ 5.15

References

4 total

Kernel Git
https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28

Patch
Kernel Git
https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b

Patch
Kernel Git
https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270

Patch
Kernel Git
https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90

Patch

Details

CVE ID CVE-2021-47368

Severity High

CVSS score 8.1 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47368?

CVE-2021-47368 is a High severity Linux kernel vulnerability with a CVSS score of 8.1 out of 10 , classified as an Uncontrolled Resource Consumption flaw (CWE-400) . It affects Linux kernel versions from 5.1 onward and has been patched in 5.4.150, 5.10.70, 5.14.9 and others. CVE-2021-47368 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47368?

CVE-2021-47368 has a CVSS score of 8.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2021-47368?

Yes. CVE-2021-47368 has been patched. Fixed versions include 5.4.150, 5.10.70, 5.14.9 and others. If you are running Linux kernel 5.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47368 actively exploited?

No. CVE-2021-47368 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.