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CVE-2025-68817

9.8 · CRITICAL

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) i…

Published Jan 13, 2026CWE-416EPSS 0.45%

Overview

CVE-2025-68817 is a critical-severity vulnerability. It was published on January 13, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21Refgit.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbeaRefgit.kernel.org/stable/c/446beed646b2e426dd53d27358365f8678e1dd01Refgit.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926Refgit.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1aRefgit.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4

How CyberStrike helps

Frequently asked questions

What is CVE-2025-68817?

CVE-2025-68817 is a critical-severity vulnerability. It was published on January 13, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-68817?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-68817?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-68817?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-68817 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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