What is CVE-2021-47332?

CVE-2021-47332 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.2 onward and patched in 5.4.134, 5.10.52, 5.12.19 and others. CVE-2021-47332 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47332?

CVE-2021-47332 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-2021-47332?

Yes, CVE-2021-47332 has been patched. Fixed versions include 5.4.134, 5.10.52, 5.12.19 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47332 actively exploited?

CVE-2021-47332 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-47332

Medium

In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: Don't call free_pages_exact() with NULL address Unlike some other functions, we can't pass NULL pointer to free_pages_exact(). Add a proper NULL check for avoiding possible Oops.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-24

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-476

CVE-2021-47332 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.2 and later are affected. Fixed in 5.4.134, 5.10.52, 5.12.19, 5.13.4, 5.14 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 5.4.134 5.4.x ✓ 5.10.52 5.10.x ✓ 5.12.19 5.12.x ✓ 5.13.4 5.13.x ✓ 5.14

References

5 total

Kernel Git
https://git.kernel.org/stable/c/7d7f30cf182e55023fa8fde4c084b2d37c6be69d

Patch
Kernel Git
https://git.kernel.org/stable/c/82e5ee742fdd8874fe996181b87fafe1eb5f1196

Patch
Kernel Git
https://git.kernel.org/stable/c/88262229b778f4f7a896da828d966f94dcb35d19

Patch
Kernel Git
https://git.kernel.org/stable/c/bee295f5e03510252d18b25cc1d26230256eb87a

Patch
Kernel Git
https://git.kernel.org/stable/c/cae0cf651adccee2c3f376e78f30fbd788d0829f

Patch

Details

CVE ID CVE-2021-47332

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47332?

CVE-2021-47332 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.2 onward and has been patched in 5.4.134, 5.10.52, 5.12.19 and others. CVE-2021-47332 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47332?

CVE-2021-47332 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-2021-47332?

Yes. CVE-2021-47332 has been patched. Fixed versions include 5.4.134, 5.10.52, 5.12.19 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47332 actively exploited?

No. CVE-2021-47332 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.