High 7.5Published Sep 5, 2025

CVE-2025-39720ksmbd: fix refcount leak causing resource not released

Updated under an hour ago (Oct 26, 2026, 1:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/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: Aug 5, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 0626e6641f6b467447c81dd7678a69c66f7746cf before a1d2bab4d53368a526c97aba92671dd71814f95a; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 36e010bb865fbaa1202fe9bcce3fd486d6db7606; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 9a7abce6e8c0e2145b346a6d4abf0d9655e9b0e8; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 89bb430f621124af39bb31763c4a8b504c9651e2	CNA record
linux linux_kernel linux:linux_kernel	from 5.15 before 6.6.103; from 6.7 before 6.12.44; from 6.13 before 6.16.4; 6.17; 6.17	NVD

References

References

https://git.kernel.org/stable/c/a1d2bab4d53368a526c97aba92671dd71814f95a	patch
https://git.kernel.org/stable/c/36e010bb865fbaa1202fe9bcce3fd486d6db7606	patch
https://git.kernel.org/stable/c/9a7abce6e8c0e2145b346a6d4abf0d9655e9b0e8	patch
https://git.kernel.org/stable/c/89bb430f621124af39bb31763c4a8b504c9651e2	patch

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.