CVE-2025-68817

ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency

CVE-2025-68817 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68817, released January 13, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0045

39th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 12.15 (bookworm)	6.1.162-1	DEBIAN-CVE-2025-68817	Jan 13, 2026
linux · Debian 13.5 (trixie)	6.12.69-1	DEBIAN-CVE-2025-68817	Jan 13, 2026
linux · Debian 14	6.18.3-1	DEBIAN-CVE-2025-68817	Jan 13, 2026

Details

Published
January 13, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68817

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