What is CVE-2025-68226?

CVE-2025-68226 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.17.8 onward and patched in 6.17.10. CVE-2025-68226 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-68226?

CVE-2025-68226 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2025-68226?

Yes, CVE-2025-68226 has been patched. Fixed versions include 6.17.10. If you are running Linux kernel 6.17.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-68226 actively exploited?

CVE-2025-68226 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-68226

High

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix incomplete backport in cfids_invalidation_worker() The previous commit bdb596ceb4b7 ("smb: client: fix potential UAF in smb2_close_cached_fid()") was an incomplete backport and missed one kref_put() call in cfids_invalidation_worker() that should have been converted to close_cached_dir().

Package Linux Kernel

Published 2025-12-16

Last modified 2026-07-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.17.8 and later are affected. Fixed in 6.17.10 and their respective stable series.

Affected from

≥ 6.17.8

Fixed in

✓ 6.17.10 6.17.x

References

1 total

Kernel Git
https://git.kernel.org/stable/c/abd29b6e17a918fdd68352ce4813e167acc8727e

Details

CVE ID CVE-2025-68226

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2025-12-16

Modified 2026-07-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-68226?

CVE-2025-68226 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.17.8 onward and has been patched in 6.17.10. CVE-2025-68226 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-68226?

CVE-2025-68226 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2025-68226?

Yes. CVE-2025-68226 has been patched. Fixed versions include 6.17.10. If you are running Linux kernel 6.17.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-68226 actively exploited?

No. CVE-2025-68226 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.