CVE-2025-40103
kernel: smb: client: Fix refcount leak for cifs_sb_tlink
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 30, 2025
Updated · June 30, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: Fix refcount leak for cifs_sb_tlink
Fix three refcount inconsistency issues related to cifs_sb_tlink.
Comments for cifs_sb_tlink state that cifs_put_tlink() needs to be
called after successful calls to cifs_sb_tlink(). Three calls fail to
update refcount accordingly, leading to possible resource leaks.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE not specified