What is CVE-2025-21830?

CVE-2025-21830 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.13 onward and patched in 5.15.179, 6.1.129, 6.6.76 and others. CVE-2025-21830 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21830?

CVE-2025-21830 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-2025-21830?

Yes, CVE-2025-21830 has been patched. Fixed versions include 5.15.179, 6.1.129, 6.6.76 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21830 actively exploited?

CVE-2025-21830 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21830

Medium

In the Linux kernel, the following vulnerability has been resolved: landlock: Handle weird files A corrupted filesystem (e.g. bcachefs) might return weird files. Instead of throwing a warning and allowing access to such file, treat them as regular files.

Package Linux Kernel

Published 2025-03-06

Last modified 2025-11-03

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 5.13 and later are affected. Fixed in 5.15.179, 6.1.129, 6.6.76, 6.12.13, 6.13.2, 6.14 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.15.179 5.15.x ✓ 6.1.129 6.1.x ✓ 6.6.76 6.6.x ✓ 6.12.13 6.12.x ✓ 6.13.2 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21830 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
Kernel patch commit
https://git.kernel.org/stable/c/0fde195a373ab1267e60baa9e1a703a97e7464cd
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2569e65d2eb6ac1afe6cb6dfae476afee8b6771a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/39bb3d56f1c351e76bb18895d0e73796e653d5c1
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2025-21830

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-03-06

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21830?

CVE-2025-21830 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.13 onward and has been patched in 5.15.179, 6.1.129, 6.6.76 and others. CVE-2025-21830 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21830?

CVE-2025-21830 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-2025-21830?

Yes — CVE-2025-21830 has been patched. Fixed versions include 5.15.179, 6.1.129, 6.6.76 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21830 actively exploited?

No — CVE-2025-21830 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.