What is CVE-2025-21828?

CVE-2025-21828 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.4 onward and patched in 6.6.76, 6.12.13, 6.13.2 and others. CVE-2025-21828 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21828?

CVE-2025-21828 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-2025-21828?

Yes, CVE-2025-21828 has been patched. Fixed versions include 6.6.76, 6.12.13, 6.13.2 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21828 actively exploited?

CVE-2025-21828 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21828

Medium

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: don't flush non-uploaded STAs If STA state is pre-moved to AUTHORIZED (such as in IBSS scenarios) and insertion fails, the station is freed. In this case, the driver never knew about the station, so trying to flush it is unexpected and may crash. Check if the sta was uploaded to the driver before and fix this.

Package Linux Kernel

Published 2025-03-06

Last modified 2025-10-31

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

Affected from

≥ 6.4

Fixed in

✓ 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-2025-21828 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/9efb5531271fa7ebae993b2a33a705d9947c7ce6
Patch
Kernel patch commit
https://git.kernel.org/stable/c/aa3ce3f8fafa0b8fb062f28024855ea8cb3f3450
Patch
Kernel patch commit
https://git.kernel.org/stable/c/cd10b7fcb95a6a86c67adc54304c59a578ab16af
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2025-21828

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-03-06

Modified 2025-10-31

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21828?

CVE-2025-21828 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.4 onward and has been patched in 6.6.76, 6.12.13, 6.13.2 and others. CVE-2025-21828 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21828?

CVE-2025-21828 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-2025-21828?

Yes — CVE-2025-21828 has been patched. Fixed versions include 6.6.76, 6.12.13, 6.13.2 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21828 actively exploited?

No — CVE-2025-21828 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.