CVE-2023-53990
Published Dec 24, 2025
Modified Apr 15, 2026
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.
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References
Other References
https://git.kernel.org/stable/c/0f87e18203bd30f71eb1a65259e28e291b6cc43a
https://git.kernel.org/stable/c/32a046ccaeea6c19965c04a4c521e703f6607924
https://git.kernel.org/stable/c/3aa9d065b0685b4e6052f3f2a2462966fdc44fd2
https://git.kernel.org/stable/c/ab9ddc87a9055c4bebd6524d5d761d605d52e557
https://git.kernel.org/stable/c/cb36365dac25d546ca4af0eb22acb43c9b4ddfdf
Frequently Asked Questions
What is CVE-2023-53990? +
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.
How do I check if I'm vulnerable to CVE-2023-53990? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.