What is CVE-2021-47403?

CVE-2021-47403 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Information Exposure flaw (CWE-200), affecting Linux kernel versions from 3.18 onward and patched in 4.4.286, 4.9.285, 4.14.249 and others. CVE-2021-47403 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47403?

CVE-2021-47403 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2021-47403?

Yes, CVE-2021-47403 has been patched. Fixed versions include 4.4.286, 4.9.285, 4.14.249 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47403 actively exploited?

CVE-2021-47403 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2021-47403

High

In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix module reference leak A reference to the carrier module was taken on every open but was only released once when the final reference to the tty struct was dropped. Fix this by taking the module reference and initialising the tty driver data when installing the tty.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-200

CVE-2021-47403 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.18 and later are affected. Fixed in 4.4.286, 4.9.285, 4.14.249, 4.19.209, 5.4.151, 5.10.71, 5.14.10, 5.15 and their respective stable series.

Affected from

≥ 3.18

Fixed in

✓ 4.4.286 4.4.x ✓ 4.9.285 4.9.x ✓ 4.14.249 4.14.x ✓ 4.19.209 4.19.x ✓ 5.4.151 5.4.x ✓ 5.10.71 5.10.x ✓ 5.14.10 5.14.x ✓ 5.15

References

8 total

Kernel Git
https://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a

Patch
Kernel Git
https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666

Patch
Kernel Git
https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c

Patch
Kernel Git
https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562

Patch
Kernel Git
https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47403

Severity High

CVSS score 7.1 / 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-2021-47403?

CVE-2021-47403 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Information Exposure flaw (CWE-200) . It affects Linux kernel versions from 3.18 onward and has been patched in 4.4.286, 4.9.285, 4.14.249 and others. CVE-2021-47403 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47403?

CVE-2021-47403 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2021-47403?

Yes. CVE-2021-47403 has been patched. Fixed versions include 4.4.286, 4.9.285, 4.14.249 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47403 actively exploited?

No. CVE-2021-47403 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.