What is CVE-2025-21679?

CVE-2025-21679 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.12.5 onward. CVE-2025-21679 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21679?

CVE-2025-21679 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-2025-21679?

No patch is currently available for CVE-2025-21679. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2025-21679 actively exploited?

CVE-2025-21679 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21679

Medium

In the Linux kernel, the following vulnerability has been resolved: btrfs: add the missing error handling inside get_canonical_dev_path Inside function get_canonical_dev_path(), we call d_path() to get the final device path. But d_path() can return error, and in that case the next strscpy() call will trigger an invalid memory access. Add back the missing error handling for d_path().

Package Linux Kernel

Published 2025-01-31

Last modified 2025-10-15

CVSS version 3.1

Patch available

Not yet patched

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 6.12.5 and later are affected. No fixed version recorded yet.

Affected from

≥ 6.12.5

References

The following references provide additional information about CVE-2025-21679 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/d0fb5741932b831eded49bfaaf33353e96200d6d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/fe4de594f7a2e9bc49407de60fbd20809fad4192
Patch

Details

CVE ID CVE-2025-21679

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-01-31

Modified 2025-10-15

KEV No

Patch

Not yet patched

Package linux

Frequently asked questions

What is CVE-2025-21679?

CVE-2025-21679 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.12.5 onward . CVE-2025-21679 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21679?

CVE-2025-21679 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-2025-21679?

No patch is currently available for CVE-2025-21679. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2025-21679 actively exploited?

No — CVE-2025-21679 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.