Description
In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_del_deferred_close function.
References5
- git.kernel.org/stable/c/0f87e18203bd30f71eb1a65259e28e291b6cc43a
- git.kernel.org/stable/c/32a046ccaeea6c19965c04a4c521e703f6607924
- git.kernel.org/stable/c/3aa9d065b0685b4e6052f3f2a2462966fdc44fd2
- git.kernel.org/stable/c/ab9ddc87a9055c4bebd6524d5d761d605d52e557
- git.kernel.org/stable/c/cb36365dac25d546ca4af0eb22acb43c9b4ddfdf
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 11 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.