What is CVE-2021-47433?

CVE-2021-47433 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 5.10.75, 5.14.14 and 5.15. CVE-2021-47433 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47433?

CVE-2021-47433 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-2021-47433?

Yes, CVE-2021-47433 has been patched. Fixed versions include 5.10.75, 5.14.14 and 5.15. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47433 actively exploited?

CVE-2021-47433 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47433

Medium

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix abort logic in btrfs_replace_file_extents Error injection testing uncovered a case where we'd end up with a corrupt file system with a missing extent in the middle of a file. This occurs because the if statement to decide if we should abort is wrong. The only way we would abort in this case is if we got a ret != -EOPNOTSUPP and we called from the file clone code. However the prealloc code uses this path too. Instead we need to abort if there is an error, and the only error we _don't_ abort on is -EOPNOTSUPP and only if we came from the clone file code.

Package Linux Kernel

Published 2024-05-22

Last modified 2025-09-25

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 5.10 and later are affected. Fixed in 5.10.75, 5.14.14, 5.15 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.75 5.10.x ✓ 5.14.14 5.14.x ✓ 5.15

References

3 total

Kernel Git
https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26c

Patch
Kernel Git
https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378

Patch
Kernel Git
https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108f

Patch

Details

CVE ID CVE-2021-47433

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-09-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47433?

CVE-2021-47433 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.75, 5.14.14 and 5.15. CVE-2021-47433 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47433?

CVE-2021-47433 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-2021-47433?

Yes. CVE-2021-47433 has been patched. Fixed versions include 5.10.75, 5.14.14 and 5.15. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47433 actively exploited?

No. CVE-2021-47433 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.