What is CVE-2025-21843?

CVE-2025-21843 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.13.4 and 6.14. CVE-2025-21843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21843?

CVE-2025-21843 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-2025-21843?

Yes, CVE-2025-21843 has been patched. Fixed versions include 6.13.4 and 6.14. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21843 actively exploited?

CVE-2025-21843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21843

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: avoid garbage value in panthor_ioctl_dev_query() 'priorities_info' is uninitialized, and the uninitialized value is copied to user object when calling PANTHOR_UOBJ_SET(). Using memset to initialize 'priorities_info' to avoid this garbage value problem.

Package Linux Kernel

Published 2025-03-07

Last modified 2025-10-01

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-908

CVE-2025-21843 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.13.4, 6.14 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.13.4 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21843 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/3b32b7f638fe61e9d29290960172f4e360e38233
Patch
Kernel patch commit
https://git.kernel.org/stable/c/64b95bbc08bacf3e4b05c8604e6a4fec43bb712a
Patch

Details

CVE ID CVE-2025-21843

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-03-07

Modified 2025-10-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21843?

CVE-2025-21843 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.13.4 and 6.14. CVE-2025-21843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21843?

CVE-2025-21843 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-2025-21843?

Yes — CVE-2025-21843 has been patched. Fixed versions include 6.13.4 and 6.14. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21843 actively exploited?

No — CVE-2025-21843 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.