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Linux Kernel: SMB Server Reference Count Leak Issue

CVE-2025-71223
Summary

A bug in the Linux kernel's SMB server could cause it to fail to release system resources when file access operations go wrong. This could lead to system instability or crashes. Linux kernel users should update their operating system to fix the issue.

Original title
In the Linux kernel, the following vulnerability has been resolved: smb/server: fix refcount leak in smb2_open() When ksmbd_vfs_getattr() fails, the reference count of ksmbd_file must be released.
Original description
In the Linux kernel, the following vulnerability has been resolved:

smb/server: fix refcount leak in smb2_open()

When ksmbd_vfs_getattr() fails, the reference count of ksmbd_file
must be released.
Published: 14 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026