What is CVE-2025-21842?

CVE-2025-21842 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.12 onward and patched in 6.12.16, 6.13.4 and 6.14. CVE-2025-21842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21842?

CVE-2025-21842 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-2025-21842?

Yes, CVE-2025-21842 has been patched. Fixed versions include 6.12.16, 6.13.4 and 6.14. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21842 actively exploited?

CVE-2025-21842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21842

Medium

In the Linux kernel, the following vulnerability has been resolved: amdkfd: properly free gang_ctx_bo when failed to init user queue The destructor of a gtt bo is declared as void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj); Which takes void** as the second parameter. GCC allows passing void* to the function because void* can be implicitly casted to any other types, so it can pass compiling. However, passing this void* parameter into the function's execution process(which expects void** and dereferencing void**) will result in errors.

Package Linux Kernel

Published 2025-03-07

Last modified 2025-10-29

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 6.12 and later are affected. Fixed in 6.12.16, 6.13.4, 6.14 and their respective stable series.

Affected from

≥ 6.12

Fixed in

✓ 6.12.16 6.12.x ✓ 6.13.4 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21842 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/091a68c58c1bbd2ab7d05d1b32c1306394ec691d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/a33f7f9660705fb2ecf3467b2c48965564f392ce
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ae5ab1c1ae504f622cc1ff48830a9ed48428146d
Patch

Details

CVE ID CVE-2025-21842

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-03-07

Modified 2025-10-29

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21842?

CVE-2025-21842 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.12 onward and has been patched in 6.12.16, 6.13.4 and 6.14. CVE-2025-21842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21842?

CVE-2025-21842 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-2025-21842?

Yes — CVE-2025-21842 has been patched. Fixed versions include 6.12.16, 6.13.4 and 6.14. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21842 actively exploited?

No — CVE-2025-21842 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.