Medium 5.5Published Sep 5, 2025

CVE-2025-39692smb: server: split ksmbd_rdma_stop_listening() out of ksmbd_rdma_destroy()

Updated under an hour ago (Oct 26, 2026, 6:50 PM ET)

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It affects Linux and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: smb: server: split ksmbd_rdma_stop_listening() out of ksmbd_rdma_destroy() We can't call destroy_workqueue(smb_direct_wq); before stop_sessions()! Otherwise already existing connections try to use smb_direct_wq as a NULL pointer.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: May 12, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	0626e6641f6b467447c81dd7678a69c66f7746cf builds before 524e90e58a267dad11e23351d9e4b1f941490976; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 212eb86f75b4d7b82f3d94aed95ba61103bccb93; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 003e6a3150299f681f34cb189aa068018cef6a45; from 0626e6641f6b467447c81dd7678a69c66f7746cf before e41e33400516702427603f8fbbec43c91ede09c0; from 0626e6641f6b467447c81dd7678a69c66f7746cf before bac7b996d42e458a94578f4227795a0d4deef6fa	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.15 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.44; from 6.13 before 6.16.4; 6.17; 6.17	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/524e90e58a267dad11e23351d9e4b1f941490976	patch
https://git.kernel.org/stable/c/212eb86f75b4d7b82f3d94aed95ba61103bccb93	patch
https://git.kernel.org/stable/c/003e6a3150299f681f34cb189aa068018cef6a45	patch
https://git.kernel.org/stable/c/e41e33400516702427603f8fbbec43c91ede09c0	patch
https://git.kernel.org/stable/c/bac7b996d42e458a94578f4227795a0d4deef6fa	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	mailing-list, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.