CVE-2025-39720

ksmbd: fix refcount leak causing resource not released

CVE-2025-39720 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-39720, released September 5, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0030

22nd percentile

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix refcount leak causing resource not released When ksmbd_conn_releasing(opinfo->conn) returns true,the refcount was not decremented properly, causing a refcount leak that prevents the count from reaching zero and the memory from being released.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 13.5 (trixie)	6.12.48-1	DEBIAN-CVE-2025-39720	Sep 5, 2025
linux · Debian 14	6.16.5-1	DEBIAN-CVE-2025-39720	Sep 5, 2025

Details

Published
September 5, 2025
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39720

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