What is CVE-2021-47336?

CVE-2021-47336 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 3.5 onward and patched in 4.9.276, 4.14.240, 4.19.198 and others. CVE-2021-47336 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47336?

CVE-2021-47336 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47336?

Yes, CVE-2021-47336 has been patched. Fixed versions include 4.9.276, 4.14.240, 4.19.198 and others. If you are running Linux kernel 3.5 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47336 actively exploited?

CVE-2021-47336 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47336

High

In the Linux kernel, the following vulnerability has been resolved: smackfs: restrict bytes count in smk_set_cipso() Oops, I failed to update subject line. From 07571157c91b98ce1a4aa70967531e64b78e8346 Mon Sep 17 00:00:00 2001 Date: Mon, 12 Apr 2021 22:25:06 +0900 Subject: [PATCH] smackfs: restrict bytes count in smk_set_cipso() Commit 7ef4c19d245f3dc2 ("smackfs: restrict bytes count in smackfs write functions") missed that count > SMK_CIPSOMAX check applies to only format == SMK_FIXED24_FMT case.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-05-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 3.5 and later are affected. Fixed in 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, 5.14 and their respective stable series.

Affected from

≥ 3.5

Fixed in

✓ 4.9.276 4.9.x ✓ 4.14.240 4.14.x ✓ 4.19.198 4.19.x ✓ 5.4.133 5.4.x ✓ 5.10.51 5.10.x ✓ 5.12.18 5.12.x ✓ 5.13.3 5.13.x ✓ 5.14

References

8 total

Kernel Git
https://git.kernel.org/stable/c/135122f174c357b7a3e58f40fa5792156c5e93e6

Patch
Kernel Git
https://git.kernel.org/stable/c/258fd821f69378453c071b9dd767b298810fc766

Patch
Kernel Git
https://git.kernel.org/stable/c/3780348c1a0e14ffefcaf1fc521f815bcaac94b0

Patch
Kernel Git
https://git.kernel.org/stable/c/49ec114a6e62d8d320037ce71c1aaf9650b3cafd

Patch
Kernel Git
https://git.kernel.org/stable/c/5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47336

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47336?

CVE-2021-47336 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 3.5 onward and has been patched in 4.9.276, 4.14.240, 4.19.198 and others. CVE-2021-47336 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47336?

CVE-2021-47336 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47336?

Yes. CVE-2021-47336 has been patched. Fixed versions include 4.9.276, 4.14.240, 4.19.198 and others. If you are running Linux kernel 3.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47336 actively exploited?

No. CVE-2021-47336 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.