What is CVE-2025-68226?

CVE-2025-68226 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2025-12-16.

How severe is CVE-2025-68226?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Linux

CVE-2025-68226

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().

EPSS: 0.002 (5.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Linux — versions bdb596ceb4b7c3f28786a33840263728217fbcf5, 6.17.8

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2025-68226?: CVE-2025-68226 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2025-12-16.
How severe is CVE-2025-68226?: High severity. CVSS v3 base score is 8.8 out of 10.