What is CVE-2021-47518?

CVE-2021-47518 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 3.12 onward and patched in 4.4.295, 4.9.293, 4.14.258 and others. CVE-2021-47518 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47518?

CVE-2021-47518 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-2021-47518?

Yes, CVE-2021-47518 has been patched. Fixed versions include 4.4.295, 4.9.293, 4.14.258 and others. If you are running Linux kernel 3.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47518 actively exploited?

CVE-2021-47518 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-2021-47518

Medium

In the Linux kernel, the following vulnerability has been resolved: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done The done() netlink callback nfc_genl_dump_ses_done() should check if received argument is non-NULL, because its allocation could fail earlier in dumpit() (nfc_genl_dump_ses()).

Package Linux Kernel

Published 2024-05-24

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-476

CVE-2021-47518 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 3.12 and later are affected. Fixed in 4.4.295, 4.9.293, 4.14.258, 4.19.221, 5.4.165, 5.10.85, 5.15.8, 5.16 and their respective stable series.

Affected from

≥ 3.12

Fixed in

✓ 4.4.295 4.4.x ✓ 4.9.293 4.9.x ✓ 4.14.258 4.14.x ✓ 4.19.221 4.19.x ✓ 5.4.165 5.4.x ✓ 5.10.85 5.10.x ✓ 5.15.8 5.15.x ✓ 5.16

References

8 total

Kernel Git
https://git.kernel.org/stable/c/3b861a40325eac9c4c13b6c53874ad90617e944d

Patch
Kernel Git
https://git.kernel.org/stable/c/48fcd08fdbe05e35b650a252ec2a2d96057a1c7a

Patch
Kernel Git
https://git.kernel.org/stable/c/4cd8371a234d051f9c9557fcbb1f8c523b1c0d10

Patch
Kernel Git
https://git.kernel.org/stable/c/69bb79a8f5bb9f436b6f1434ca9742591b7bbe18

Patch
Kernel Git
https://git.kernel.org/stable/c/811a7576747760bcaf60502f096d1e6e91d566fa

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47518

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47518?

CVE-2021-47518 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 3.12 onward and has been patched in 4.4.295, 4.9.293, 4.14.258 and others. CVE-2021-47518 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47518?

CVE-2021-47518 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-2021-47518?

Yes. CVE-2021-47518 has been patched. Fixed versions include 4.4.295, 4.9.293, 4.14.258 and others. If you are running Linux kernel 3.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47518 actively exploited?

No. CVE-2021-47518 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.