Use After Free in Linux
CVE-2025-68817
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency Under high concurrency, A tree-connection object (tcon) is freed on a disconnect path while another path still holds a reference and later executes *_put()/write on it.
Vulnerability class: Use-After-Free
EPSS: 0.002 (5.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 6.18.3, 7b58ee8d0b91359554cf219cd4f33872ea2afd66, 6.19
- Linux Linux_kernel — versions 6.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-68817?
- CVE-2025-68817 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2026-01-13.
- How severe is CVE-2025-68817?
- Critical severity. CVSS v3 base score is 9.8 out of 10.