1256672 – (CVE-2025-68817) VUL-0: CVE-2025-68817: kernel: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency

Bug 1256672 (CVE-2025-68817) - VUL-0: CVE-2025-68817: kernel: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency

Summary: VUL-0: CVE-2025-68817: kernel: ksmbd: fix use-after-free in ksmbd_tree_connec...

Status:	NEW

Alias:	CVE-2025-68817

Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents (show other bugs)
Version:	unspecified
Hardware:	Other Other

Priority:	P3 - Medium Severity: Normal
Target Milestone:	---
Assignee:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/491414/
Whiteboard:	CVSSv3.1:SUSE:CVE-2025-68817:5.5:(AV:...
Keywords:

Depends on:
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Reported:	2026-01-14 11:28 UTC by SMASH SMASH
Modified:	2026-04-09 08:50 UTC (History)
CC List:	2 users (show)

See Also:
Found By:	Security Response Team
Services Priority:
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Blocker:	---
Marketing QA Status:	---
IT Deployment:	---

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Description SMASH SMASH 2026-01-14 11:28:38 UTC

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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-68817
https://www.cve.org/CVERecord?id=CVE-2025-68817
https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21
https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea
https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926
https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a
https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-68817.mbox