What is CVE-2021-47002?

CVE-2021-47002 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 5.10.220 onward and patched in 5.10.221, 5.11.22, 5.12.5 and others. CVE-2021-47002 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47002?

CVE-2021-47002 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-2021-47002?

Yes, CVE-2021-47002 has been patched. Fixed versions include 5.10.221, 5.11.22, 5.12.5 and others. If you are running Linux kernel 5.10.220 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47002 actively exploited?

CVE-2021-47002 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-2021-47002

Medium

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check. Addresses-Coverity: ("Dereference after null check")

Package Linux Kernel

Published 2024-02-28

Last modified 2026-05-12

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-2021-47002 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 5.10.220, 5.11 and later are affected. Fixed in 5.10.221, 5.11.22, 5.12.5, 5.13 and their respective stable series.

Affected from

≥ 5.10.220 ≥ 5.11

Fixed in

✓ 5.10.221 5.10.x ✓ 5.11.22 5.11.x ✓ 5.12.5 5.12.x ✓ 5.13

References

5 total

Kernel Git
https://git.kernel.org/stable/c/1e10f58f1c9a6b667b045513c7a4e6111c24fe7c

Patch
Kernel Git
https://git.kernel.org/stable/c/3de81c1e84bf84803308da3272a829a7655c5336

Patch
Kernel Git
https://git.kernel.org/stable/c/b9f83ffaa0c096b4c832a43964fe6bff3acffe10

Patch
Kernel Git
https://git.kernel.org/stable/c/c664aaec9aee544538a78ba4893a44bc73a6d742

Patch
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Details

CVE ID CVE-2021-47002

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2026-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47002?

CVE-2021-47002 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 5.10.220 onward and has been patched in 5.10.221, 5.11.22, 5.12.5 and others. CVE-2021-47002 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47002?

CVE-2021-47002 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-2021-47002?

Yes. CVE-2021-47002 has been patched. Fixed versions include 5.10.221, 5.11.22, 5.12.5 and others. If you are running Linux kernel 5.10.220 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47002 actively exploited?

No. CVE-2021-47002 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.