What is CVE-2021-47263?

CVE-2021-47263 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.6 onward and patched in 5.10.44, 5.12.11 and 5.13. CVE-2021-47263 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47263?

CVE-2021-47263 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-2021-47263?

Yes, CVE-2021-47263 has been patched. Fixed versions include 5.10.44, 5.12.11 and 5.13. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47263 actively exploited?

CVE-2021-47263 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47263

Medium

In the Linux kernel, the following vulnerability has been resolved: gpio: wcd934x: Fix shift-out-of-bounds error bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1) which is not right, and this was caught by below usban check UBSAN: shift-out-of-bounds in drivers/gpio/gpio-wcd934x.c:34:14

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-30

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

Affected versions

Linux kernel versions 5.6 and later are affected. Fixed in 5.10.44, 5.12.11, 5.13 and their respective stable series.

Affected from

≥ 5.6

Fixed in

✓ 5.10.44 5.10.x ✓ 5.12.11 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/dbec64b11c65d74f31427e2b9d5746fbf17bf840

Patch
Kernel Git
https://git.kernel.org/stable/c/dd55331d493b7ea75c5db1f24d6822946fde2862

Patch
Kernel Git
https://git.kernel.org/stable/c/e0b518a2eb44d8a74c19e50f79a8ed393e96d634

Patch

Details

CVE ID CVE-2021-47263

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47263?

CVE-2021-47263 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.6 onward and has been patched in 5.10.44, 5.12.11 and 5.13. CVE-2021-47263 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47263?

CVE-2021-47263 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-2021-47263?

Yes. CVE-2021-47263 has been patched. Fixed versions include 5.10.44, 5.12.11 and 5.13. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47263 actively exploited?

No. CVE-2021-47263 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.