What is CVE-2025-21833?

CVE-2025-21833 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.7 onward and patched in 6.12.57, 6.13.3 and 6.14. CVE-2025-21833 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21833?

CVE-2025-21833 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-2025-21833?

Yes, CVE-2025-21833 has been patched. Fixed versions include 6.12.57, 6.13.3 and 6.14. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21833 actively exploited?

CVE-2025-21833 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2025-21833

Medium

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE There is a WARN_ON_ONCE to catch an unlikely situation when domain_remove_dev_pasid can't find the `pasid`. In case it nevertheless happens we must avoid using a NULL pointer.

Package Linux Kernel

Published 2025-03-06

Last modified 2025-11-02

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

Weakness type

CWE-476

CVE-2025-21833 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.7 and later are affected. Fixed in 6.12.57, 6.13.3, 6.14 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.12.57 6.12.x ✓ 6.13.3 6.13.x ✓ 6.14

References

3 total

Kernel Git
https://git.kernel.org/stable/c/60f030f7418d3f1d94f2fb207fe3080e1844630b

Patch
Kernel Git
https://git.kernel.org/stable/c/df96876be3b064aefc493f760e0639765d13ed0d

Patch
Kernel Git
https://git.kernel.org/stable/c/68ec78beb4a3fb0877cbaaf49758c85410c05977

Details

CVE ID CVE-2025-21833

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-03-06

Modified 2025-11-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21833?

CVE-2025-21833 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.7 onward and has been patched in 6.12.57, 6.13.3 and 6.14. CVE-2025-21833 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21833?

CVE-2025-21833 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-2025-21833?

Yes. CVE-2025-21833 has been patched. Fixed versions include 6.12.57, 6.13.3 and 6.14. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21833 actively exploited?

No. CVE-2025-21833 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.